Re: [X2Go-User] grab keyboard (dwm)

[Mike Gabriel]

Hi,

On  Do 04 Jul 2024 15:57:29 CEST, sjomae wrote:


This does not work with

export NX_CLIENT="/usr/bin/x2goclient"
I just rebooted and it works actually. Not sure why restarting the  
x2go service didn't do it, but ok.


but setting NX_CLIENT to /usr/bin/x2goclient is wrong. X2Go Client  
does not know how to handle NX dialog requests.


You need to install nxdialog to /usr/bin on the X2Go Server and set  
NX_CLIENT to /usr/bin/nxdialog during session startup (i.e. before  
nxagent/x2goagent comes up:


https://gitlab.x2go.org/x2go/server/x2goserver/-/merge_requests/3

Mike
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Re: [X2Go-User] x2go-user Digest, Vol 119, Issue 3

[Mike Gabriel]

HI

On  Mo 20 Mai 2024 21:34:47 CEST, Ulrich Sibiller wrote:


Hi,

I can't troubleshoot this issue. I have removed X2goclient from the
Debian Stable (Bookworm) install, including all config, but when
installing it fresh, it still does crash with a Segsev, is this bug
known? I can't use X2go anymore on Linux, it just fails, without a way
to find out what breaks. This issue has blocked me for many months
now, it works on Windows, but most of my machines are running Linux.

Anybody have an idea what I can try next?

Thanks,

Markus



Hello,

your bug report is a bit "unspecific". What desktop environment / window
manager are you using? What kind of session? Where are you connecting to?
How is your session configured? Have you tried pyhoca-cli and / or
pyhoca-gui?

Uli

On Mon, May 20, 2024 at 3:54 AM Sagittarius-A Black Hole <
nigrat...@gmail.com> wrote:



Maybe it is about this issue?
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1042816

What is the best approach to address this. As X2Go Client interacts  
with the remote X session, it surely would make sense to launch the  
complete X2Go Client process via QT_QPA_PLATFORM=xcb and require  
XWayland to run. Is that a viable approach? Where should we enforce  
that (that being the switched from Wayland display to X11 display)?


Mike
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Re: [X2Go-User] Mounting USB drives in remote computer

[Mike Gabriel]

Hi Kalle,

On  Mi 10 Apr 2024 08:30:06 CEST, Kalle Tuulos wrote:


Hello

I'm using Ubuntu 20.04 with LXQt (i.e., Lubuntu) on the remote computer.
When I'm using the computer locally and plug in an USB drive, It will be
automatically mounted and shown in file explorer. But when I'm using the
computer remotely, I'll just get a prompt saying "Error: Not authorized to
perform operation"

Could someone help me to configure the remote computer so that when I plug
in an USB drive, it would behave as I would use the computer locally?

Best regards and greetings from Finland

Kalle


do you want to plugin the USB flashdrive into the X2Go client computer  
or into remote computer?


Mike
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Re: [X2Go-User] Remote printing not working

[Mike Gabriel]

Hi Rui,

On  Sa 23 Sep 2023 02:01:23 CEST, Rui Ferreira wrote:


Às 19:37 de 21/09/23, Mike Gabriel escreveu:

HI Rui,

thanks for reporting the below issue.


[...]>
However, we can tweak cups-x2go [1]. It would be nice if you could  
experiment with that a little and move the "$ENV{TMPDIR}="/tmp";"  
statement that is part of the script to the very top of the script  
(after all the "use ...;" statements.


When done, remove your hack again (which brings back more security  
into your CUPS daemon) and re-test cups-x2go. Let me know if that  
works for you. If so, please send your patch.


Thanks,
Mike


Hello Mike

Thank you for your fast response and sorry for my slow one.

It wasn't that, but your tip showed me the way.
The answer begins here:

https://git.ghostscript.com/?p=ghostpdl.git=search=HEAD=commit=setpdfwrite

Ghostscript deprecated 'setpdfwrite' in 2019 and removed it in 2021,  
or version 9.54.

To solve this, I edited /etc/cups/cups-x2go.conf:

ps2pdf = /usr/bin/gs -q -dCompatibilityLevel=1.4 -dNOPAUSE -dBATCH  
-dSAFER -sDEVICE=pdfwrite -sOutputFile=-  
-dAutoRotatePages=/PageByPage -dAutoFilterColorImages=false  
-dColorImageFilter=/FlateEncode -dPDFSETTINGS=/prepress  
-dDoNumCopies -f \"%s\"


This alone should've solved my problem... yet it wasn't working :(
After many hours of self commiseration, I found that the culprit to  
be a leading space in the command, in this line


my $gs_pid = open2 ($gs_out, $gs_in, $ps2pdf_cmd, @ps2pdf_args);

where $ps2pdf_cmd would translate to ' /usr/bin/gs'.

So, I had to learn just enough Perl to correct this:

if($option eq "ps2pdf")
{
$ps2pdf=$value;
$ps2pdf=~s/^\s+//; < my solution
}

Now, about sending patches... I've never done it before.

I'm not sure if just changing the default ghostscript command line,  
hardcoded in the Perl script and the .conf file, is the best  
solution for everyone.
And I'm not sure if the way I found to trim that leading whitespace  
is the best solution.


I'm too uncertain.

Regards,
Rui Ferreira



Thanks for the follow-up. To be 100% sure, your changes land in  
cups-x2go appropriately, please do the following:



git clone https://code.x2go.org/git/cups-x2go.git

Now copy your version of the cups-x2go script into the newly cloned  
cups-x2go/ folder.


Change dir into that folder and check output of "git diff".

Commit that change, e.g. via "git commit --patch -m "cups-x2go: Fix  
." Find a good commit message one-liner.


The run "git format-patch HEAD~..HEAD". This will create a patch file.

Please send this patch file attached to a reply to this mail.

Thanks!

Mike


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Re: [X2Go-User] Remote printing not working

[Mike Gabriel]

HI Rui,

thanks for reporting the below issue.

On  Do 21 Sep 2023 20:28:44 CEST, Rui Ferreira wrote:


Hi all.

Error from journalctl -u cups:

set 21 18:34:55 kubuntu /usr/lib/cups/backend/cups-x2go[412569]:  
Print job received from cups -> 1060 rui Re: [X2Go-User] Client  
Printing not working! 1 Collate media=iso_a4_210x297mm_borderless  
Duplex=None job-uuid=urn:uuid:1bce9974-59ca-3cad-7012-b36b56aaf124  
job-originating-host-name=localhost date-time-at-creation=  
date-time-at-processing= time-at-creation=1695317694  
time-at-processing=1695317694 PageSize=A4


set 21 18:34:56 kubuntu /usr/lib/cups/backend/cups-x2go[412569]:  
ERROR: ps2pdf conversion program failed to convert  
/tmp/1060-rui-cupsjob412569RZtB07cJEZ6R_uD_: failed with exit code 1


set 21 18:34:56 kubuntu /usr/lib/cups/backend/cups-x2go[412569]:  
ERROR: cups-x2go failed to process postscript file  
/tmp/1060-rui-cupsjob412569RZtB07cJEZ6R_uD_



Output from cat /etc/systemd/system/printer.target.wants/cups.service:

[Unit]
Description=CUPS Scheduler
Documentation=man:cupsd(8)
After=network.target nss-user-lookup.target nslcd.service
Requires=cups.socket

[Service]
ExecStart=/usr/sbin/cupsd -l
Type=notify
Restart=on-failure
PrivateTmp=false <

[Install]
Also=cups.socket cups.path
WantedBy=printer.target multi-user.target

(even though this is not the right way to make local changes to systemd)

I've issued the commands
   systemctl daemon-reload
and
   systemctl restart cups.service

OS:
 kubuntu 22.04
 x2goserver 4.1.0.3
 cups 2.4.1


As X2Go developers, we don't have much impact on the CUPS systemd  
service start file. That is owned by the CUPS software package.


However, we can tweak cups-x2go [1]. It would be nice if you could  
experiment with that a little and move the "$ENV{TMPDIR}="/tmp";"  
statement that is part of the script to the very top of the script  
(after all the "use ...;" statements.


When done, remove your hack again (which brings back more security  
into your CUPS daemon) and re-test cups-x2go. Let me know if that  
works for you. If so, please send your patch.


Thanks,
Mike
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Re: [X2Go-User] x2go parallel to LTSP

[Mike Gabriel]

On  Mi 14 Jun 2023 11:57:39 CEST, Olaf wrote:


Hi!

Is it possible to use x2go-server on a server parallel to LTSP?
If so, would it be possible


Yes.

a) to decide when booting the client whether to load an LTSP image  
or the x2go-TCE?


You need to separate thinclient images. And use your bootloader to  
select one or the other image.



b) take over an LTSP session remotely via x2go?


Nope.

Mike

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Re: [X2Go-User] Many segfault across multiple desktops via X2go server on EL9 systems

[Mike Gabriel]

Hi Tom, hi Uli,

On  Fr 28 Apr 2023 21:01:36 CEST, Tom Crane wrote:

I originally submitted a detailed bug report at the Mate Desktop  
issues Github page here  
https://github.com/mate-desktop/mate-desktop/issues/553.


I subsequently discovered that other desktops are similarly  
affected. All of them experienced segfaults or kernel traps in parts  
of their components, particularly in the Marco window manager that  
Mate uses.


I have also tried Gnome, Kde, xfce, Cinnamon & Icewm desktops, again  
on a Centos Stream 9 system.  Similar results were found on an Alma  
9 system so I do not believe the problem is specific to the  
'upstream' / lesser-tested nature of CS9.


Apart from Icewm which remained usable even with the segfaults, the  
other desktops (particularly Mate which we use a lot for remote  
working) are rendered unusable by this problem.  None of our Centos  
7 systems have this problem.


I am running out of ideas to diagnose/fix this problem.

Any thoughts?


note that MATE upstream has fixed marco and now checks properly on the  
available Xres extension version before using its API (and crashing).


See upstream: [1].

In Debian unstable, I added those patches this recently: [2].

Greets,
Mike

[1] https://github.com/mate-desktop/marco/pull/747/commits
[2]  
https://salsa.debian.org/debian-mate-team/marco/-/tree/master/debian/patches  
(patches 0001, 0002 and 0003).



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Re: [X2Go-User] Turn off the computer after the time has elapsed.

[Mike Gabriel]

On  Fr 20 Aug 2021 09:41:30 CEST, ovt wrote:


We need a script for a thin client:
If within 10 minutes the user has not opened a session, turn off the
computer.


You could install shutdown-at-night [1] on those thinclients and call  
the script every 20 minutes.


The shutdown-at-night package might need some adjustments, though for  
detecting that someone is logged in via X2Go or not. The  
shutdown-at-night tool works great on desktop computers.


Mike

[1] https://packages.debian.org/sid/shutdown-at-night
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Re: [X2Go-User] connecting to a just booted machine

[Mike Gabriel]

HI again,

On  Fr 06 Aug 2021 18:25:04 CEST, Mike Gabriel wrote:


On  Do 05 Aug 2021 17:51:20 CEST, Stefan Baur wrote:


Am 05.08.21 um 17:45 schrieb Carlos Alfaro:

Any suggestions as to where I can look at or what configuration
setting to add or change so I can launch as session and get the log on
screen of the server?


To me, your description sounds like you're using X2Go to mirror the
local display. I'm not quite sure if that is supposed to work with no
one logged in; my guess is that the behavior you are seeing should be
considered "works as designed".


X2Go local desktop mirroring is designed to work with logged-in  
local sessions only.


Correcting myself, X2Go session mirroring is for mirroring local  
desktop sessions and of course, also for mirroring headless X2Go  
sessions. But not for connecting to a computer where no user has  
logged in so far.


Mike
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Re: [X2Go-User] connecting to a just booted machine

[Mike Gabriel]

On  Do 05 Aug 2021 17:51:20 CEST, Stefan Baur wrote:


Am 05.08.21 um 17:45 schrieb Carlos Alfaro:

Any suggestions as to where I can look at or what configuration
setting to add or change so I can launch as session and get the log on
screen of the server?


To me, your description sounds like you're using X2Go to mirror the
local display. I'm not quite sure if that is supposed to work with no
one logged in; my guess is that the behavior you are seeing should be
considered "works as designed".


X2Go local desktop mirroring is designed to work with logged-in local  
sessions only.


Mike
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Re: [X2Go-User] Session not starting with Python 3 on Windows

[Mike Gabriel]

Hi Tomáš,

sorry for the delay in my reply. I was on VAC.

On  Di 27 Jul 2021 21:10:57 CEST, Tomáš Cerha wrote:

The upstream PyHoca GUI still uses Python2 on distros that still  
have Python2. On Debian 11, PyHoca GUI runs on Python3.


And are there any known attempts to make it work on Python 3 on Windows?


Nope. Currently not.


Your problem seems to be in this session.log line:

```
Error: Wrong version or invalid session authentication cookie.
```


Do I understand it correctly when I assume that cookie is not the  
problem when I see the same cookie in X2Go client log and in the  
options file present in the session directory as indicated below?


Hmmm... you are right. Yes.

pytis2go[8736] (x2goproxy-pylib) DEBUG: NX3 Proxy mode is server,  
cookie=2532ea9e54c10c087472bb500e715d1d, host=127.0.0.1, port=52113.


The “options” file in the session directory contains:

nx/nx,retry=5,composite=1,connect=127.0.0.1,clipboard=1,cookie=2532ea9e54c10c087472bb500e715d1d,port=52113,errors=.\..\S-cerha-50-1627381881_stRxterm_dp32\session.err:50


So if the cookie is ok, what problem might be with the version?  How  
do I check which version is expected?


Hmmm...

Are you sure that the user that launches nxproxy.exe can access the  
local (MS Windows side) Xserver correctly?


Yes, believe that the user can access the Windows xserver (VcXsrv  
1.15.2.2) because when I run the same client in Python 2 environment  
with the same X server, it works as expected.


Hmmm...

Or, the cookie string is wrong (see options file) and differs by  
some reason (X2Go client side / server side).


Probably not as indicated above.

Both the X server and the nxproxy.exe binary are the same versions  
in both cases (with X2Go client running in Python 2 or Python 3).   
It just does not work with Python 3.


Oh well, then it really must be the Python 3 variant of the code.

In nx-libs upstream sources [1], you find some testscripts that you  
could modify and check if the interplay of nxproxy.exe (MSWin  
version) and nxagent (on Linux / X2Go Server) play together well.


Thank you for pointing this out. I will try to experiment with these  
testscripts.


The only bit on Python X2Go that never was really tested against  
Python3 is the code in x2go/xserver.py. This code is only used on  
Windows.


I am not sure at all, if your implementation uses it. If it is, make  
sure it doesn't do unexpected things.


Also, Windows firewall might be blocking traffic. I assume that it  
recognized the pytis2go py2 as a different application from pytis2go  
py3. Make sure Windows firewall is disabled or has the appropriate  
port tolerances. X2Go Client implementations are quite demanding on  
open firewall ports.



Otherwise, I am sorry! I have no clue where to look next from remote.

Mike
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Re: [X2Go-User] Speedup Desktop Performance

[Mike Gabriel]

Hi,

On  Do 15 Jul 2021 15:13:45 CEST, Ulrich Sibiller wrote:


you'll have to figure out how to
set up such a session in your environment.


you could install x2gothinclient-displaymanager and set up session  
profiles that connect to localhost:22.


Then you have a display manager like frontend that logs you into your  
own host and the session you get logged into is an X2Go session.


Mike
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Re: [X2Go-User] script after resume

[Mike Gabriel]

Hi Richard,

On  So 18 Jul 2021 08:47:48 CEST, richard lucassen wrote:


Hello list,

Is there a way to run a script after resuming a paused session?

R.


Yes.

From dpkg -L x2goserver-extensions:

/usr/lib/x2go/extensions/fail-resume.d
/usr/lib/x2go/extensions/fail-resume.d/.placeholder
/usr/lib/x2go/extensions/fail-runcommand.d
/usr/lib/x2go/extensions/fail-runcommand.d/.placeholder
/usr/lib/x2go/extensions/fail-start.d
/usr/lib/x2go/extensions/fail-start.d/.placeholder
/usr/lib/x2go/extensions/fail-suspend.d
/usr/lib/x2go/extensions/fail-suspend.d/.placeholder
/usr/lib/x2go/extensions/fail-terminate.d
/usr/lib/x2go/extensions/fail-terminate.d/.placeholder
/usr/lib/x2go/extensions/post-resume.d
/usr/lib/x2go/extensions/post-resume.d/.placeholder
/usr/lib/x2go/extensions/post-runcommand.d
/usr/lib/x2go/extensions/post-runcommand.d/.placeholder
/usr/lib/x2go/extensions/post-start.d
/usr/lib/x2go/extensions/post-start.d/.placeholder
/usr/lib/x2go/extensions/post-suspend.d
/usr/lib/x2go/extensions/post-suspend.d/.placeholder
/usr/lib/x2go/extensions/post-terminate.d
/usr/lib/x2go/extensions/post-terminate.d/.placeholder
/usr/lib/x2go/extensions/pre-resume.d
/usr/lib/x2go/extensions/pre-resume.d/.placeholder
/usr/lib/x2go/extensions/pre-runcommand.d
/usr/lib/x2go/extensions/pre-runcommand.d/.placeholder
/usr/lib/x2go/extensions/pre-start.d
/usr/lib/x2go/extensions/pre-start.d/.placeholder
/usr/lib/x2go/extensions/pre-suspend.d
/usr/lib/x2go/extensions/pre-suspend.d/.placeholder
/usr/lib/x2go/extensions/pre-terminate.d
/usr/lib/x2go/extensions/pre-terminate.d/.placeholder

Pick your hook folder...

Mike
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Re: [X2Go-User] Session not starting with Python 3 on Windows

[Mike Gabriel]

ether well.


Mike

[1] https://github.com/ArcticaProject/nx-libs


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Re: [X2Go-User] redirect the smartcard device

[Mike Gabriel]

On  Di 27 Jul 2021 12:12:15 CEST, Anton Shevtsov wrote:


Hi, official x2goclient supports redirect the smartcard devices? like as,
xfreerdp /smartcard option.. ?


Not that I know of.

Mike
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Re: [X2Go-User] Move from freenode?

[Mike Gabriel]

Hi all,

On  Mi 19 Mai 2021 17:18:05 CEST, Ulrich Sibiller wrote:


AFAIKS freenode is not the network of choice anymore:

https://mniip.com/freenode.txt

So should we move to libera? Or elsewhere? Or drop the chat altogether?

Uli


For the record, the #x2go channel on irc.libera.chat is up and  
running. Project registration will be completed tomorrow (some US  
midwest timezone).


Please join us over, we recommend evacuating Freenode.

Mike
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Re: [X2Go-User] Move from freenode?

[mike . gabriel]

Hi,

Am Mittwoch, 19. Mai 2021 schrieb Stefan Baur:
> Am 19.05.21 um 17:18 schrieb Ulrich Sibiller:
> > AFAIKS freenode is not the network of choice anymore:
> > 
> > https://mniip.com/freenode.txt
> > 
> > So should we move to libera? Or elsewhere? Or drop the chat altogether?
> 
> I would second such a move.  (We need to remember that we have to update
> the Wiki as well, though. The channel might be mentioned on more than
> just one page there.)
> 
> -Stefan
> 

+1 from my side.

Mike

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Re: [X2Go-User] Removing "Suspend X2go Session.." in Ubuntu Mate desktop System Panel , 20.04

[Mike Gabriel]

Hi,

On  So 16 Mai 2021 21:08:45 CEST, h i wrote:


Hello,

How can you remove the "Suspend X2Go Sesseion..." item from the  
Ubuntu Mate System panel?


[cid:8d0d43b2-6e97-4a50-87a4-d76edbc29ab6]

In Ubuntu 18.04, this was linked with x2gomatebindings. Uninstalling  
the bindings removed it. However, with Ubuntu 20.04, I could not  
locate x2gomatebindings in the Ubuntu repository. I want to remove  
it because  we don't need it and it doesn't work well with x2go  
client. Clicking on the item makes the desktop session disappear,  
but the x2go client window says the session is still running and  
doesn't disappear.


Thanks.

h.


The "Suspend X2Go Session..." menu item is now coded into the  
corresponding MATE panel applet (via librda).


Currently, there is no "switch" to disable it, but it could be a  
feature request.


The other issue is that X2Go Client does not recognize the session  
suspension properly when done from inside the session, it seems.


If you open a terminal in the X2Go session and issue the command  
x2gosuspend-session on the command line, do you observe the same  
behaviour? (i.e. session goes away, but X2Go Client does not get it?)


Mike
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Re: [X2Go-User] x2goserver Requires: base64

[Mike Gabriel]

Hi Scott, hi Mihai,

On  Mo 19 Apr 2021 04:28:32 CEST, Scott Wood wrote:


Hi folks,

Just looking to upgrade to nightly on a CentOS7 system.  I have the  
repo file installed.  I disabled the default and enabled the nightly  
and gave it the old "yum update "x2go*"


...
Resolving Dependencies
--> Running transaction check
---> Package x2goserver.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
---> Package x2goserver.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
--> Processing Dependency: perl-X2Go-Server =  
4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 for package:  
x2goserver-4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7.x86_64
--> Processing Dependency: perl(X2Go::Server::Agent::NX::Options)  
for package:  
x2goserver-4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7.x86_64
--> Processing Dependency: base64 for package:  
x2goserver-4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7.x86_64
---> Package x2goserver-common.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
--> Processing Dependency: x2goserver-common =  
4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 for package:  
perl-X2Go-Log-4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7.x86_64
--> Processing Dependency: x2goserver-common =  
4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 for package:  
perl-X2Go-Server-DB-4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7.x86_64
---> Package x2goserver-common.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
---> Package x2goserver-extensions.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
---> Package x2goserver-extensions.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
---> Package x2goserver-x2goagent.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
---> Package x2goserver-x2goagent.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
---> Package x2goserver-xsession.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
---> Package x2goserver-xsession.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update

--> Running transaction check
---> Package perl-X2Go-Log.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
---> Package perl-X2Go-Log.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
---> Package perl-X2Go-Server.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
---> Package perl-X2Go-Server.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
---> Package perl-X2Go-Server-DB.x86_64  
0:4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7 will be updated
---> Package perl-X2Go-Server-DB.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
---> Package x2goserver.x86_64  
0:4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7 will be an update
--> Processing Dependency: base64 for package:  
x2goserver-4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7.x86_64

--> Finished Dependency Resolution
Error: Package:  
x2goserver-4.1.0.4-0.0x2go1.0.git20210418.1930.heuler.el7.x86_64  
(x2go-nightly-epel)

   Requires: base64
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

There is no package in standard repos that I could find names  
base64.  Any tips?


Cheers!


I encountered the same with the DEB packages. The base64 executable  
normally is available in one of the distro's core packages (in  
general, there might be exceptions).


Mike

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Re: [X2Go-User] X2go session broker configuration question

[Mike Gabriel]

Hi,

On  Di 09 Jun 2020 19:54:11 CEST, Simon Gao wrote:


Hi All,
I'm trying to set up x2go session broker and following this instruction at

wiki:advanced:x2gobroker:loadbalancing [X2Go - everywhere@home].

|
|
|
|  |  |

 |

 |
|
|  |
wiki:advanced:x2gobroker:loadbalancing [X2Go - everywhere@home]


 |

 |

 |

I'm running into an issue with:sudo x2gobroker-pubkeyauthorizer  
--broker-url http(s)://://pubkeys/
What files should I put in /pubkeys/ directory?  When I put in one  
pub key for the session broker, I received following error:


2020-06-09 10:52:39,836 - broker - INFO - Authorizing access to this  
X2Go server for X2Go Session Broker
2020-06-09 10:52:39,836 - broker - INFO - at URL  
https://x2gobroker.example.com/pubkeys/x2gobrokerpubkey.pub
2020-06-09 10:52:39,866 - broker - INFO -   Found 1 public key at  
URL https://x2gobroker.example.com/pubkeys/x2gobrokerpubkey.pub

Traceback (most recent call last):
  File "/usr/sbin/x2gobroker-pubkeyauthorizer", line 206, in 
    keytype, pubkey, owner = new_pubkey.rsplit(" ", 2)
ValueError: not enough values to unpack (expected 3, got 2)

Any help is appreciated.
Simon


What version of x2gobroker on what distro are you using???

Greets,
Mike
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Re: [X2Go-User] X2Go Kdrive, current status? Ready for official release?

[Mike Gabriel]

Hi Alex, hi all,

On  Mi 27 Mai 2020 11:55:46 CEST, Oleksandr Shneyder wrote:


Am 26.05.20 um 13:45 schrieb Mike Gabriel:

Hi Alex,

I wonder when would be a good point to get X2Go Kdrive to the majority
of X2Go users. I will plan some X2Go work for July and this would be a
good occasion to get a new X2Go Server version out containing the X2Go
Kdrive wrapper code.

What's the maturity status of X2Go Kdrive? Is it releasable?

If not, we should get an X2Go server release out anyway and make sure it
behaves well, if no X2Go Kdrive Xserver ist installed server-side.



Hi Mike,
I can't answer this question. My customers are using it productively
since longer than one year, however the number of use cases is limited
here. I didn't see a lot of test reports from other users. So I'm not
able (and don't want to) decide when it's ready for community release.
Maybe some of users, if anyone already tried it, can give some comments
on it.




What do people think about this?


@X2Go Users / Devs: what do others thing about the state of X2Go  
KDrive? Shall we open it up to a wider "audience"?


Greets,
Mike
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Re: [X2Go-User] x2goversion problem affecting pyhoca-cli, and a solution

[Mike Gabriel]

Hi Michael, hi Mihai,

On  Do 21 Mai 2020 00:15:20 CEST, Michael Ashley wrote:


Hi folks,

While trying to get pyhoca-cli to work, I noticed that x2goversion  
on the server was printing out the version numbers without the  
leading component names. E.g.,


: 4.1.0.3
: 4.1.0.3
: 4.1.0.3
: 4.1.0.3
: 4.1.0.3
: 3.5.99.23
: 4.1.0.3

instead of:

x2goserver: 4.1.0.3
x2goserver-common: 4.1.0.3
x2goserver-extensions: 4.1.0.3
x2goserver-fmbindings: 4.1.0.3
x2goserver-printing: 4.1.0.3
x2goserver-x2goagent: 3.5.99.23
x2goserver-xsession: 4.1.0.3

The problem was that my X2GO_VERSIONS_BASEPATH had a ".." in it,  
which caused the following line in x2goversion to fail:


X2GO_COMPONENT="$(echo "${compfile}" | cut -d '.' -f '2')"

A fix is to replace the line with:

X2GO_COMPONENT=${compfile#*VERSION.}

Finally, to have a working pyhoca-cli, you need to use the version  
from 11 March 2020 or later  
https://code.x2go.org/gitweb?p=pyhoca-cli.git;a=tree


Regards,
Michael


This is a know issue and needs to be addressed by a new upstream  
release of X2Go Server. In Debian and recent Ubuntu, I have fixed this  
issue a while back.


@Mihai, reading this, could you prepare a new release of pyhoca-cli,  
to get the fix for #1445 out?


Thanks+Greets,
Mike
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Re: [X2Go-User] The future of x2gokdrive

[Mike Gabriel]

Hi Alex,

On  Do 07 Mai 2020 15:29:56 CEST, Oleksandr Shneyder wrote:


Hello guys,

Looks like my E-Mail brought some excitement into the list :) First of
all it was not my intention, I just wanted to share with you some of my
thoughts. Second, I don't think that we will have something ready before
the end of the year (depending on the resources I'll have). For sure, if
some one wants to work into the same direction, you are welcome. I also
want to add some of my thoughts about NX and X2Go.
NX is obsolete. It was obsolete many years ago. Xorg is becoming
obsolete as well. And X2Go is already obsolete too, because we are
sticking to this technologies way too long. Don't understand me wrong,
those are great technologies, which will be used for many years more by
some people and companies, we should not drop their support and we
should not stop to improve them. But we also should not things like NX
slow down our development. Because majority of the users don't want NX.
They want to use modern desktops and modern applications. And they don't
care, that NX works better with legacy desktops and legacy X11 apps on
256K network, because they are not using them anyway and they have at
home in worse case 10M network and even on their cell phones they have a
good Internet connection.

@Stefan: I think it's great, that you finding sponsoring and it helps to
support the project. But we also should not forget, to separate the
wishes of our sponsors and our customers from that what is good for the
project. We can't concentrate only on that what our sponsors want,
because in this case at some point they'll be our only users. We should
also think more about future and what should we do to win new users to
the project.


All above: well said! I share your view on all points given.


At the end I want to give you some points I think I will work on in the
next one or two years:

1. Improvement of x2go kdrive: adaptive compression level, video
compression for some regions, frame dropping, etc


Nice!


2. x2gokdrive client - HTML5, Using OpenGL for image composition


Nice!


3. Finally rewrite x2go client, multi session support, x2go kdrive
client should be part of x2go client, etc.


Wait, for PyHoca-GUI, I'd love to have a standalone application. Maybe  
provide the x2gokdriveclient as a libqt shared lib and have  
(a) a command line executable wrapped around it and (b) use it in X2Go  
Client for rendering.


Thanks+Greets,
Mike
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Re: [X2Go-User] The future of x2gokdrive

[Mike Gabriel]

On  Do 07 Mai 2020 11:59:57 CEST, Stefan Baur wrote:


Am 07.05.20 um 11:51 schrieb Ulrich Sibiller:


A plain, classic-NX X2Go session on the same server works just fine.

$SOMETHING inside the DE is trying to tell local and remote sessions
apart (which is a good thing), and KDrive is confusing this detection
mechanism due to how it works, so you get all those weird effects (which
is a bad thing).

I guess this also happens with Xephyr then but not with Xnest.


That guess goes into the right direction, I'd say.  Just a few days ago
I ran OpenBox on :1 inside Xephyr, and made the mistake of clicking
"exit" there.  Zap, my actual session on :0 went down as well.

-Stefan


You need to wrap openboard into a "dbus-run-session", e.g.

one shell:

Xephyr -ac :1

other shell:

STARTUP=openbox-session dbus-run-session /etc/X11/Xsession

This is another cup of tea and related to systemd's Dbus integration  
concept (1 user <-> 1 session, even if on multiple seats)


Mike
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Re: [X2Go-User] The future of x2gokdrive

[Mike Gabriel]

Hi Uli,

On  Do 07 Mai 2020 11:29:41 CEST, Ulrich Sibiller wrote:


As I wrote before: this makes NX absolutely obsolete. You can then
just use kdrive and be fine.


NX has its performance advantage on WAN connections when used with  
appropriate desktops. That's why I think we should keep both  
technologies around, until everything else has become Wayland anyway  
(20 years+).


The charming side about the image/compression protocol behind X2Go  
Kdrive is that it is X11 agnostic and can plugged into Wayland  
compositors, as well. No changes required on the client-side at all  
for this.


Mike
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Re: [X2Go-User] The future of x2gokdrive

[Mike Gabriel]

Hi Uli,

On  Do 07 Mai 2020 11:18:49 CEST, Ulrich Sibiller wrote:


What am I missing that make you excited about all that?


The device portability. I am not saying that X2Go Kdrive is the  
solution to everything, but that it solves two problems:


  * clients without Xserver
  * at some later point: servers with Wayland based sessions

Mike
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Re: [X2Go-User] The future of x2gokdrive

[Mike Gabriel]

Hi Stefan,

On  Do 07 Mai 2020 10:38:11 CEST, Stefan Baur wrote:


Am 07.05.20 um 10:35 schrieb Mike Gabriel:

Again, that sounds nice as an add-on, but basic NX support in an HTML5
client should take priority.  After all, that's what our sponsors asked
for - and not a broker-/multi-server DMZ solution.
It's fine to design the solution with a possible broker-add-on in mind,
but please don't focus on the broker more than on the NX support.


Why stick to the NX support, if we have a native graphical backend  
that's html5 compliant.


The NX -> x11vnc -> NoVNC solution will always be worse (slower, more  
itchy and glitchy).


(and: it should not be a big deal to implement it once we have the web  
framework around it).


Mike
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Re: [X2Go-User] The future of x2gokdrive

[Mike Gabriel]

Hi Stefan,

On  Do 07 Mai 2020 10:29:13 CEST, Stefan Baur wrote:


Am 07.05.20 um 10:14 schrieb Mike Gabriel:


The work Alex is doing is exactly what I discussed with him. My approach
of providing X2Go through VNC in a web platform would only have been an
interim solution.


Alright, that's good to know! :)


:-)


I am still planning to work on a X2Go Session Broker based frontend for
X2Go and will happily use Alex html5 client code (instead of NoVNC) in it.


Okay, now you've got me confused: What does an X2Go Session Broker have
to do with the NX HTML5 client?  I mean, obviously, that would be a nice
add-on, but we should have a foundation before discussing bells and
whistles for the interior design of the house we're building.


The broker will handle the server-side(!!!) storing and provisioning  
of session profiles and dispatch session possibly to other servers  
(webserver being exposed in the DMZ, while X2Go Servers are on the  
intranet, just to pick one use case).


Mike
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Re: [X2Go-User] The future of x2gokdrive

[Mike Gabriel]

Hi Stefan hi Alex, hi Uli,

On  Do 07 Mai 2020 09:28:50 CEST, Stefan Baur wrote:


Am 07.05.20 um 09:01 schrieb Ulrich Sibiller:

With x2gokdrive you only have to deal with images while with bx you have to
implement a X server in the browser.


Obviously.  But I thought Mike#1 specified a particular framework he
wanted to use, and this one doesn't sound like it's the same.  At least
the name doesn't ring any bells.
So, two different frameworks that we'll have to stitch together somehow
if we want a unified HTML5 client for NX and KDrive - or we'll have to
ditch whatever Alex' did and start from scratch to get KDrive integrated
into Mike#1's approach ... both options seem less than ideal.

-Stefan


The work Alex is doing is exactly what I discussed with him. My  
approach of providing X2Go through VNC in a web platform would only  
have been an interim solution.


I am still planning to work on a X2Go Session Broker based frontend  
for X2Go and will happily use Alex html5 client code (instead of  
NoVNC) in it.


This sounds all pretty much promising!
Mike
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Re: [X2Go-User] Can't connect to server with user 'A' but with user 'B'

[Mike Gabriel]

Hi Henrik,

On  Do 16 Apr 2020 12:00:33 CEST, Henrik Schmidt wrote:


Am 27.03.2020 um 14:24 schrieb Mike Gabriel:

Hi Henrik,

On  Mi 25 Mär 2020 11:20:11 CET, Henrik Schmidt wrote:


Ok Mike,

Logs attached.

Henrik


What you see here is nxagent (aka x2goagent) crashing at session  
startup. X2Go Client and PyHoca bail out at the same point.


In ~/.x2go/ server-side and client-side, you should find  
session.log, session.err and an options file.


For a failing session, please send those files too me (off-list).

Thanks+Greets,
Mike


I found the problem thanks to  
https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1091#10


X2goclient crashed but Pyhoca didn't, so I double checked my  
.profile and .bashrc.
I found that calling the rvm (ruby version manager) scripts in  
$HOME/.rvm was the problem. After removing them x2go worked as  
expected.


Yeah, that's a common issue. I tend to forget about that.


Stay safe


You, too.

Mike
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Re: [X2Go-User] Can x2go session be initiated from a server to listening client?

[Mike Gabriel]

On  Mo 06 Apr 2020 19:19:58 CEST, Andrew Munn wrote:


I'd like to initiate an x2go session from a server behind a firewall to a
listening client with port 22 open.  How can that be done?  thanks!


Run "ssh -R 12345:localhost:22 user@client" on the server (see man  
page of ssh client for correct usage of -R option) and open up a  
reverse tunnel from some port (e.g. 12345) on the client to port 22 on  
the server (to be more precise, localhost:22).


Then configure X2Go Client on the client to connect to "Host:  
localhost" and "Port: 12345" and you have your X2Go session ready to  
roll.


Mike
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Re: [X2Go-User] Can't connect to server with user 'A' but with user 'B'

[Mike Gabriel]

Hi Henrik,

On  Mi 25 Mär 2020 11:20:11 CET, Henrik Schmidt wrote:


Ok Mike,

Logs attached.

Henrik


What you see here is nxagent (aka x2goagent) crashing at session  
startup. X2Go Client and PyHoca bail out at the same point.


In ~/.x2go/ server-side and client-side, you should find session.log,  
session.err and an options file.


For a failing session, please send those files too me (off-list).

Thanks+Greets,
Mike
--

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Re: [X2Go-User] Can't connect to server with user 'A' but with user 'B'

[Mike Gabriel]

Hi Henrik,

On  Sa 21 Mär 2020 10:08:54 CET, Henrik Schmidt wrote:

Yes, a fresh user does work. Therefore I'm curious which user  
properties can cause this kind of problem.
I noticed that some LD_LIBRARY_PATH settings can screw x2go,  
therefore I used a default .profile for the problematic user.


Can it be some of that users local ssh settings?


Hmmm... Does the same error occur with the same server-side user  
account when connecting from a Linux machine?


If so, could you install pyhoca-cli (from packages.x2go.org) and run

  pyhoca-cli --server  --user  --command XFCE --libdebug

and send the complete debug output (maybe not to the list..)? I will  
reply to your mail and re-Cc: the list with feedback.


Mike
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Re: [X2Go-User] kde bug

[Mike Gabriel]

Hi,

On  So 22 Mär 2020 01:18:23 CET, Bilinmek Istemiyor wrote:


Hello,

I have been searching for a remote desktop solution to manage two manjaro
linux machines at my home, after fiddling with vnc, I have come across to
x2go, I am pretty impressed with the setup, and I thank you all who has
contributed this software..

I would like to report one issue. In x2go client, there is an option of
selecting desktop environments. I am using KDE in both machines. When I
select KDE, the connection can not be established since startkde fails.

KDE has changed startkde to startplasma-x11. I have tried to circumvent
this problem by symbolic linking startkde to startplama-x11 by symbolic
linking in the same directory which is /usr/bin. However this failed.

I gave up KDE option. I have selected Custom Destop option and entered
startplasma-x11 as the command which worked.

I believe the KDE option must be updated accordion to new command..

Another issue is, the windows' menu fonts are exceptionally big even though
the contents seem proportional.. I do not know if this is  relevant to the
missing of some options... Native connection with monitor does not have
this issue.

Best regards...


in /usr/bin/x2goruncommand, there is the mapping between "KDE" and the  
command to be executed.


Can you fiddle on a patch that makes x2goruncommand work again with  
your plasma/kde setup? If so, could you provide your patch?


Thanks+Greets,
Mike
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Re: [X2Go-User] X2go on CentOS 8?

[Mike Gabriel]

On  Mo 10 Feb 2020 22:55:31 CET, Michael Eager wrote:


http://packages.x2go.org/epel/ doesn't have a subdirectory for CentOS 8.

Is there a better X2go repo for CentOS 8?

I'm running pyhoca-cli-0.6.1.3 on the client and the server is running
x2goserver-4.1.0.  I understand that there is a known incompatibility
between the two versions which has been fixed upstream.


Please apply this fix to /usr/bin/x2goversion and then you should be fine.

https://code.x2go.org/gitweb?p=x2goserver.git;a=commitdiff;h=c80103788eebe0445efc2cefb56b074231b76f39

Mike
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Re: [X2Go-User] Ubuntu 16.04 break

[Mike Gabriel]

Hi,

On  Sa 07 Dez 2019 08:10:28 CET, Jeff Sadowski wrote:


x2godbadmin --createdb
does not seem to be working where should it create it?



in /var/lib/x2go/.

Is your partition where /var rests full? Or not writable by group x2gouser?

Please try removing that file and create it anew with x2godbadmin (as  
you suggested above).


Greets,
Mike
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Re: [X2Go-User] Can't solve error: "Access denied. Authentication that can continue: publickey, password"

[Mike Gabriel]

HI Franziska,

On  Di 12 Nov 2019 12:51:12 CET, Franziska Goltz wrote:


Hi all,

I cross-checked but when I try to log in with the "try auto login"  
box unchecked, I get the following error again:


Access denied. Authentication that can continue: publickey,password
Access denied. Authentication that can continue: publickey,password


I have seen this with "try auto login" and ssh-agent usage in X2Go  
Client a lot of times.


This IMHO is a bug in libssh and needs investigation.

I am trying to use XFCE now, installed the xfce desktop on my server  
with "sudo apt install -y xubuntu-desktop", but when I try to start  
the session, a window (black window with "X2Go" in it" just quickly  
opens and then immediately closes again so no succes here either  
unfortunately. I get these warnings:


Loop: WARNING! Unrecognized session type 'unix-kde-depth_32'.  
Assuming agent session.
Warning: Unrecognized session type 'unix-kde-depth_32'. Assuming  
agent session.

Loop: WARNING! Could not retrieve the X server authentication cookie.
Warning: Failed to read data from the X auth command.
Warning: Generated a fake cookie for X authentication.


This should actually work.

X2Go Client is a bit silent about why things fail during session startup.

Please start x2goclient from the cmdline with "x2goclient --debug" and  
maybe the debug output is more revealing about what is failing.


Just out of curiosity, does the X2Go session startup work from a Linux  
machine (if at hand). It is always good to determine, if a problem  
comes from a client or from a server.


On Linux, you can also try a session startup with heavy debugging  
results using the pyhoca-cli command line client for X2Go:


  pyhoca-cli --libdebug --server  --port  --user  
 --command XFCE


If the problem is server-side, this would be my next debugging step.

Greets,
Mike
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Re: [X2Go-User] x2gobroker-wsgi installation manual - something is missing

[Mike Gabriel]

Hi,

sorry for the late reply on this (although promised differently).

On  Do 15 Aug 2019 04:42:38 CEST, gleb.shipitsyn wrote:


Hey, lads. I was following manual on official wiki about session broker
installation in wsgi mode. It feels to me that manual isn't complete
though.

Apparently installing apache2, py3, wsgi mod support,
x2gobroker-authservice and x2gobroker-wsgi and putting some changes into
/etc/x2go/x2gobroker.conf is not enough to get promised url
http://servername/uccs/inifile I am after.

I can see default apache greetings on :80, I can see (a2enconf) that
apache2 is aware of x2broker-wsgi conf but that's about it. Addressing
.../uccs/inifile returns 404, addressing .../x2gobroker returns 403.

I'm experimenting with Ubuntu Server 18.04 and with whatever is in official
x2go ppa.


Have you followed this documentation?
https://github.com/ArcticaProject/ArcticaDocs/blob/master/ArcticaGreeter/ArcticaGreeter_RemoteLogon-HowTo.md

I recommend to get the ArcticaGreeter Remote Logon working with  
x2gobroker-daemon first. I in fact never tested it with the WSGI  
alternative. And... WSGI support will soon be removed from Tornado  
(the httpd used by X2Go Broker).


Unfortunately, the remote logon setup is quite fragile (before it runs  
100%) and you can make mistakes at various places.


Please work your way through the above documentation and let me know  
if any of the described steps don't work for you. Please re-post to  
the ML and put my email in Cc: so that I don't miss your post.


Thanks+Greets,
Mike
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Re: [X2Go-User] pxe boot server

[Mike Gabriel]

Hi,

On  Di 23 Jul 2019 00:32:33 CEST, Luciano Andino wrote:


El dom., 21 jul. 2019 a las 9:42, Mike Gabriel (<
mike.gabr...@das-netzwerkteam.de>) escribió:


Hi Luciano,

On  Fr 12 Jul 2019 00:40:25 CEST, Luciano Andino wrote:

> Hello, I am building a PXE boot server for the X2Go TCE (stretch version)
> in Debian 10,  for remote logging to an X session, and I did:
>
> # x2gothinclient_create
>
> and after some minutes I receive in log:
> '/opt/x2gothinclient/etc/x2gothinclient_sessions' ->
> '/opt/x2gothinclient/chroot/etc/x2go/x2gothinclient_sessions'
> '/opt/x2gothinclient/etc/x2gothinclient-displaymanager_background.svg' ->
>
'/opt/x2gothinclient/chroot/etc/x2go/x2gothinclient-displaymanager_background.svg'
> cp: cannot stat '/opt/x2gothinclient/etc/freerdp/known_hosts*': No such
> file or directory
>
> process stops

What version of x2gothinclient(-management) are you currently using?
When grepping through the current code (I looked at Git master [1]), I
can't see a cp for known_hosts in x2gothinclient_create.



Hello Mike, is this the current version ?

# dpkg -l| grep x2go
ii  x2go-keyring 2012.07.23+git20170305.17+9.main.1
 all  GnuPG keys of all X2Go developers and the X2Go archive
ii  x2gothinclient-management
 1.5.0.0-0x2go1+git20181202.691+9.main.1 all  Management tools for
X2Go Thin Client chroot server
ii  x2gothinclientmanagement
1.5.0.0-0x2go1+git20181202.691+9.main.1 all  temporary dependency
package for migration to x2gothinclient-management

thanks


Those versions should  be ok. Please add "set -x" at the top of the  
x2gothinclient_create script (below the copyright header) and send the  
last few lines of the resulting output when you re-rung  
x2gothinclient_create.


Greets,
Mike
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Re: [X2Go-User] browser crashes on disconnect

[Mike Gabriel]

Hi,

On  Mo 08 Jul 2019 20:00:00 CEST, Paul Borowicz wrote:


I've been using x2go for awhile now, years. Recently I rebuilt my server
and moved the drives around.

I used to be able to leave a session running with firefox or chrome, but
everytime I disconnect now Firefox and chrome die. Other programs, for
example konsole and qbittorrent don't, just browsers.

I've looked in my journelctl and I don't see anything. Any ideas?
I'm on Opensuse 15.


Paul Borowicz


you may want to edit /etc/x2go/x2goagent.options and try to add the  
"sleep=0" parameter to X2GO_NXOPTIONS (at the bottom of recent  
versions of that file).


If you require a throttling down of X2Go sessions when suspended,  
please consider enabling the X2Go SuperReNicer code in  
/etc/x2go/x2goserver.conf.


Mike
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Re: [X2Go-User] Good thing to add to .bashrc and .cshrc files

[Mike Gabriel]

Hi,

On  Mi 10 Jul 2019 16:29:01 CEST, Jeff Sadowski wrote:


I had posted the bash one here before I just ran into some tcsh users
that where having similar issues so I thought it might be helpful.

My .bashrc starts with the 2 lines

if [ "$BASH_EXECUTION_STRING" != "" ]; then return 0; fi
# do not add items before this line

This helps with sftp and x2go if you have things that interfere with
x2go or sftp like changing directories or adding paths that might
interfere or just code block that might interfere.

for tcsh add the following 2 lines to the top of your .cshrc

if ( `set |grep "^command.bash" |grep "X2GO"` != "" ) exit
# do not add items before this line


As we cannot fiddle with user space files (~/.bashrc and such) in  
packaging, this should either be reported to your distro's bash  
package (to modify .bashrc in /etc/skel) or added to the X2Go wiki.


Greets,
Mike
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Re: [X2Go-User] pxe boot server

[Mike Gabriel]

Hi Luciano,

On  Fr 12 Jul 2019 00:40:25 CEST, Luciano Andino wrote:


Hello, I am building a PXE boot server for the X2Go TCE (stretch version)
in Debian 10,  for remote logging to an X session, and I did:

# x2gothinclient_create

and after some minutes I receive in log:
'/opt/x2gothinclient/etc/x2gothinclient_sessions' ->
'/opt/x2gothinclient/chroot/etc/x2go/x2gothinclient_sessions'
'/opt/x2gothinclient/etc/x2gothinclient-displaymanager_background.svg' ->
'/opt/x2gothinclient/chroot/etc/x2go/x2gothinclient-displaymanager_background.svg'
cp: cannot stat '/opt/x2gothinclient/etc/freerdp/known_hosts*': No such
file or directory

process stops


What version of x2gothinclient(-management) are you currently using?  
When grepping through the current code (I looked at Git master [1]), I  
can't see a cp for known_hosts in x2gothinclient_create.



, no interested in rdp.


Please note that we have to be generic here. Some people use the X2Go  
TCE for accessing RDP servers (either pure Windows RDP environments or  
Windows RDP / X2Go mixed environments), so we have support for that  
added.


Greets,
Mike
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Re: [X2Go-User] x2goserver on salix

[Mike Gabriel]

Hi,

On  Do 21 Mär 2019 09:02:29 CET, Robert Dinse wrote:


My e-mails regarding x2go on salix have not gotten any response to date,
but on the off chance someone is following here is some more data.

 I tried to connect using PyHoca-GUI and it says authentication failed
for all servers and users I tried, even ones that the regular  
x2goclient works

fine with.



Depending on the SSH server version and the PyHoca-GUI version (rather  
the python-paramiko version) you might run into problems regarding the  
host key types.


Old version of Paramiko supported only RSA + DSA for a long time. If  
you connect to SSH to a modern server and accept the ecdsa hostkey, it  
might happen that you cannot connect with paramiko anymore.


(I can't remember the exact details, but I have been there before...).

You could try to hack some Python Paramiko script together and check,  
if you can SSH into the X2GoServer using Paramiko, at all:

https://github.com/paramiko/paramiko/tree/master/demos

If that works, then we can start looking into Python X2Go itself.

Mike
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Re: [X2Go-User] x2gobroker on CentOS 7

[Mike Gabriel]

Hi,

On  Di 05 Mär 2019 16:35:50 CET, quetengoqueponeraqui wrote:


I’m trying to install the broker on a CentOS 7 machine (rpms not on epel,
so downloading from x2go’s repos) but it complains about several python3
dependencies. Even with python36 installed it cannot find python3 and
related packages. Any idea?


this sounds like the .spec file of x2gobroker needs some patchwork.  
The fastest way to solve this for you is getting x2gobroker sources  
and build x2gobroker from source using the "mock" utility (with your  
required modifications to x2gobroker.spec, probably).


Once you found a patch for the .spec file, please submit it as a bug  
and we get that fix in asap.


Greets,
Mike
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Re: [X2Go-User] Help need with Linux-Linux Kerberos Authentication

[Mike Gabriel]

Hi,

On  Fr 25 Jan 2019 14:42:27 CET, Stefan Baur wrote:


Am 25.01.19 um 11:19 schrieb rubens.zana...@grad.ufsc.br:

I think it might be the client version that's causing the problem.
4.1.1.0 introduced a fix for Bug 592 [0], but, in doing so, broke other
things related to Kerberos, as reported in Bug 1258 [1] and (hopefully)
fixed in 4.1.2.0.


Yes, updating to 4.1.2.1 through the PPA fixed it. Working perfectly
with Kerberos now.


Yay! :-)

@Mike#1: Do you think you can get X2GoClient 4.1.2.1 pushed into Ubuntu
(at least 18.04, possibly 16.04 as well), so people don't need to add
the PPA?
"Un-breaks Kerberos support" sounds like a valid reason to get it updated.


Nope. I am not a Ubuntu MOTU Developer. Neither would they (Ubuntu  
MOTU team) accept new upstream releases for such a minor reason  
(sorry, but Krb5 Login support is still a rare case scenario).


Mike
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[X2Go-User] x2godesktopsharing applet starts multiple times in KDE Plasma if restore desktop is set

[Mike Gabriel]

Package: x2godesktopsharing
Severity: important
Version: 3.2.0.0
X-Debbugs-Cc: jose...@gmail.com

Hi,

I turn this thread into an official bug report...

On  So 09 Dez 2018 13:59:02 CET, Víctor J. Sánchez E. wrote:



El mié., 5 dic. 2018 a las 15:09, Víctor J. Sánchez ()
escribió:


Hi all,

I recently installed x2godesktopsharing via X2Go repositories for Debian.
The installation asked me about activate the auto-start feature (I said
yes) and enable shared desktop (I said no). When I reboot the machine in
KDE Plasma desktop I see two x2godesktopsharing applets in system tray and
the next error message is displayed (translated into english):

*The application X2Go DesktopSharing is already active for this screen*

*if it doesn't run remove /tmp/x2godesktopsharing.lock_USER@:0 and start
it up again*

I don't know about x2godesktopsharing is started because I can't find
anything in the documentation about it. I only see the file
/etc/xdg/autostart/x2godesktopsharing.desktop but I don't see any system
service (systemctl) nor KDE Plasma desktop's startup service or script.

How could I resolve this issue?

Some data about my system:

- Debian testing (amd64), kernel 4.18.0-3-amd64

- KDE Plasma 5.14.3

- x2godesktopsharing 3.2.0.0

Thanks in advance.




Hi all again,

after investigate deeper about this issue I noted that every log in in KDE
Plasma session the number of x2godesktopsharing applets were increasing in
system tray (until 5 applets or more!!).
I discovered that the restore of KDE Plasma session setting was inexplicably
resetted (may due to an update). I set it again to starts an empty session
and the problem has gone. Now it only starts only one x2godesktopsharing
system tray applet.
The setting is in KDE System Settings -> Startup and Shutdown -> Desktop
Session -> On Login switch to "Start with an empty session" instead of
"Restore previous session".

Regards.




This looks like we should hinder x2godesktopsharing from starting a  
second instance when there is one already running for the same $DISPLAY.


Mike
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Re: [X2Go-User] suspended sessions are not restoring

[Mike Gabriel]

Hi David,

On  Mi 07 Nov 2018 18:37:17 CET, David Barron wrote:

My problems with suspended sessions are continuing, so I am forced  
to continue requesting help.


Of course, I'm using -broker-url with the client, but if I do not  
and I create my sessions, they suspend perfectly.  So whatever the  
issue is, it appears to be related to broker.


Any help would be appreciated.


Please consider getting professional help, please consider reading the  
code. Both will help.


The session resuming works here, with correctly set up systems (using  
x2gobroker from the nightly builds).


Mike


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Re: [X2Go-User] suspended sessions are not restoring

[Mike Gabriel]

On  Di 06 Nov 2018 15:02:33 CET, David Barron wrote:

I mentioned this problem last week and went back and forth a few  
times but there was no resolution.  Since I am being paid to  
implement this I have no choice but to bring it up again.  My  
apologies.


I have the broker running on a login server and my applications  
running on 3 x2go servers.  Everything is working fine except for  
this one thing.


I can suspend a session, and when I run x2golistsessions I am seeing  
the suspended sessions in the database.  But when I run the same  
application the suspended session is not starting up, I am getting a  
new one.  I can verify that because if I run x2golistsessions while  
the new session is running I see two sessions in the database.


I've tried taking two of my application servers out of the picture  
and limiting it to 1, but I still see the same thing.


I've got PostgreSQL running on my broker server, and all the  
application servers access it without a problem.  At least I can run  
x2golistsessions on all three without a problem.


If it matters, after running x2goversion on the application servers  
I'm seeing this


x2goserver: 4.1.0.0
x2goserver-common: 4.1.0.0
x2goserver-extensions: 4.1.0.0
x2goserver-x2goagent: 3.5.99.16
x2goserver-xsession: 4.1.0.0

And on the broker server I see this

X2goserver: 4.1.0.2
X2goserver-common: 4.1.0.2
X2goserver-extensions: 4.1.0.2
X2goserver-x2goagent: 3.5.99.16
X2goserver-xsession: 4.1.0.2

Any suggestions would be appreciated.


You need the x2gobroker-agent package installed on the X2Go Server  
machines and assure that broker <-> broker-agent communcation is  
working.


Only then, X2Go Client will be able to resume suspended sessions.

Mike

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Re: [X2Go-User] It might be that we already have KDE5/Plasma support ...

[Mike Gabriel]

On  Do 27 Sep 2018 23:11:25 CEST, Robert Dinse wrote:


Well, with Fedora 28, KDE is just a back screen


Same here, too. Seeing it on Debian testing and (!) on Debian stretch, too.

On Debian stretch, things used to work well with X2Go + KDE5.  
Regarding Debian's conservative release policy, this smells like we  
changed something in X2Go, maybe, too.


Although, this doesn't explain, why KDE5 from Fedora 27 was working ok  
for Robert.


Mike
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Re: [X2Go-User] MATE screensaver is not activated when connected via x2go

[Mike Gabriel]

Hi All,

On  Do 24 Mai 2018 08:48:07 CEST, Jens Bürger wrote:


Dear Walid,


Am 23.05.2018 um 17:08 schrieb Walid MOGHRABI :

This is a known bug in mate and pretty hard to debug/fix apparently.

There is a workaround anyway, you can create a small script that  
starts xautolock at user session start like this :


[…]

Works great!  Thanks a lot!

Jens


With next nxagent release Walid's work-around is obsolete. The issue  
has been addressed in nxagent upstream.

https://github.com/ArcticaProject/nx-libs/pull/713

Mike
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[X2Go-User] Subscription information regarding x2go-user - please read

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Re: [X2Go-User] [X2Go-Dev] Deprecation and removal of X2Go Plugin

[Mike Gabriel]

On  Di 13 Mär 2018 09:57:07 CET, Mihai Moldovan wrote:


Hi


Since most browsers either stopped supporting NPAPI (or will be  
dropping support

with the next ESR version) and Qt 5 does not feature a browser plugin
architecture any longer, I will be ripping out code related to the  
X2Go Plugin

in the development version of X2Go Client soonish.

Expect the next version to not supply X2Go Plugin binaries.



Mihai


Good! Finally!

Mike
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Re: [X2Go-User] Gnome 3 and X2go

[Mike Gabriel]

On  Mo 29 Jan 2018 01:28:57 CET, Robert Dinse wrote:


When gnome3 first came out I was unsuccessful at getting it to work with
x2go.  However, I just tried installing gnome-flashback and gave it  
another shot, now it mostly works except I can find no way of  
logging out except to
kill the gnome-flashback process.  Am I missing something that  
should be installed or is it broken this way?


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in old days, it was

  gnome-session-save --logout

from a terminal. This you could add as a panel shortcut button if all  
other approaches fail.


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Re: [X2Go-User] install x2gobroker

[Mike Gabriel]

Hi Mihai,

On  Do 23 Nov 2017 06:08:19 CET, Mihai Moldovan wrote:


* On 11/17/2017 10:34 AM, Mike Gabriel wrote:

An update version of python(2,3)-wsgilog is available via Debian unstable.

I am currently negotiating with Mihai, who will add that package
version to our x2go-extras repo area.


For Debian Wheezy, Jessie and Stretch, I have uploaded rebuilt python-wsgilog
and python3-wsgilog packages in the extras component.


Thanks for doing this!

Mike
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Re: [X2Go-User] install x2gobroker

[Mike Gabriel]

Hi,

On  Fr 17 Nov 2017 10:30:03 CET, Stefan Baur wrote:


Am 17.11.2017 um 10:11 schrieb "BOTZ Franck (Administrateur Systèmes et
Réseaux) - DDT 67/SIDSIC/Pôle Infra":


How to correct this dependancy problem ?


This is probably because the broker is currently transitioning to
python3. As always, X2Go nightly builds may be spontaneously unusable
any time. Maybe Mike#1 can provide more details.


The new broker version needs python3-wsgilog. Current Ubuntu LTS only  
has python(2)-wsgilog.


An update version of python(2,3)-wsgilog is available via Debian unstable.

I am currently negotiating with Mihai, who will add that package  
version to our x2go-extras repo area.


Mike
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Re: [X2Go-User] pyhoca-gui and i3wm

[Mike Gabriel]

HI Zenny.

On  Sa 26 Aug 2017 09:27:49 CEST, Zenny wrote:


1. This issue has been fixed by installing manually all the components of
x2go server from scratch (the precreated lxc-container from
https://sourceforge.net/projects/ubuntu-business-desktop-lxc/ was the
culprit). Now it works fine with pyhoca-gui.


Ok. Good you found that.


2. In order to avoid conflicts with the same i3 keybindings inside the x2go
client session and the host to the x2go client (local instance), I take the
advantage of i3's pass-through capability by appending i3 config as follows:

mode "pass-through" {
bindsym $mod+t mode "default"
}

bindsym $mod+t mode "pass-through"

Loving pyhoca and i3 and x2go. Hope this is useful for someone in my shoes
in the future.

Cheers,
/z


We have a more sustainable fix for that, working for all desktop envs  
/ window managers:

https://github.com/ArcticaProject/nx-libs/pull/494

With this changeset, you will be able to toggle autograb mode using  
STRG-ALT-G. When enabled, all inputs end up in the nxagent session  
while the pointer device hovers over it.


When toggled again, the current behaviour gets reinstated.

However, this requires some complicated test-setup using x2goserver  
from Git master and nx-libs from github.com/ArcticaProject/nx-libs  
(3.6.x branch).


Greets,
Mike
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Re: [X2Go-User] Python3-x2go

[Mike Gabriel]

On  Sa 04 Mär 2017 00:10:15 CET, Seth Galitzer wrote:

I'm trying to follow  
http://wiki.x2go.org/doku.php/wiki:development:build-howto-linux:x2goclient  
and getting stuck. I can clone the x2goclient git repo just fine  
(step 2a), but am unable to clone the nxproxy repo (step 1). I get  
"access denied or repository not exported". I was able to clone the  
nx-libs repos, but am not finding documentation on how to build  
that. I also looked at  
http://wiki.x2go.org/doku.php/wiki:development:deb-buildguide to  
setup my build environment.


For cloning "nxproxy" repo, please use:

  git clone https://github.com/ArcticaProject/nx-libs/

That's where latest development happens... X2Go will switch to that  
new version probably within the next year, too.


Mike
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Re: [X2Go-User] libnx

[Mike Gabriel]

Hi Walid,

On  Fr 03 Mär 2017 16:20:26 CET, Walid MOGHRABI wrote:

Upgraded to 3.5.99.4 yesterday and this one is, at least for my use  
case, a LOT more stable ... had no crash by now :D


And 3.5.99.5 will have a lot less valgrind complaints. See todays  
commit history.


Mike
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[X2Go-User] Downtime today: packages.x2go.org (and git., bugs., code., lists. alike)

[Mike Gabriel]

Hi all,

due to some luck, I have time today to upgrade the machine hosting  
diverse X2Go and Arctica services (aka ymir.das-netzwerkteam.de) to a  
recent Linux OS and also move the machine (a VM) to a newer  
virtualization host.


So expect availability to be sort-of wobbly today. Affected services:

  lists.x2go.org
  packages.x2go.org
  packages.arctica-project.org
  bugs.x2go.org
  git.x2go.org
  code.x2go.org

light+love,
Mike
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Re: [X2Go-User] pyhoca-cli stopped working for me, ValueError: CTR mode needs counter parameter, not IV

[Mike Gabriel]

Hi Markus

On  Fr 17 Feb 2017 09:11:38 CET, Markus wrote:


pyhoca-cli stopped working for me. I expected it to ask me for password,
but instead it raises an exception.

I don't know what happened, because this works all the time. And I think
I didn't change anything.

The error message is: "ValueError: CTR mode needs counter parameter, not IV"


Used command:

pyhoca-cli --server xxx -u xx -R
-xx-xx_-session_


The output:

pyhoca-cli[14890] NOTICE: preparing requested X2Go session
pyhoca-cli[14890] (PyHocaCLI) NOTICE: preparing requested X2Go session
pyhoca-cli[14890] (x2gosessregistry-pylib) NOTICE: registering X2Go
session Pyhoca-Client_Session...
pyhoca-cli[14890] (x2goclient-pylib) NOTICE: initializing X2Go session...
pyhoca-cli[14890] (x2gocontrolsession-pylib) NOTICE: connecting to
[working]:22
No handlers could be found for logger "paramiko.transport"
Traceback (most recent call last):
  File "/usr/bin/pyhoca-cli", line 422, in 
thisPyHocaCLI.authenticate()
  File "/usr/lib/python2.7/dist-packages/pyhoca/cli/frontend.py", line
455, in authenticate
self._X2GoClient__connect_session(self.x2go_session_hash,
username=_username, password=self.args.password,
force_password_auth=force_password_auth)
  File "/usr/lib/python2.7/dist-packages/x2go/client.py", line 1367, in
connect_session
sshproxy_force_password_auth=sshproxy_force_password_auth,
  File "/usr/lib/python2.7/dist-packages/x2go/session.py", line 1322, in
connect
**_params)
  File
"/usr/lib/python2.7/dist-packages/x2go/backends/control/plain.py", line
1001, in connect
look_for_keys=look_for_keys)
  File "/usr/lib/python2.7/dist-packages/paramiko/client.py", line 325,
in connect
t.start_client()
  File "/usr/lib/python2.7/dist-packages/paramiko/transport.py", line
492, in start_client
raise e
ValueError: CTR mode needs counter parameter, not IV


Please resend this mail to the X2Go bug tracker, I will reply to it  
once it has been filed as a proper bug.


Bug submission is explained here:
http://wiki.x2go.org/doku.php/wiki:bugs

Thanks
Mike
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Re: [X2Go-User] fuse-sshfs package

[Mike Gabriel]

On  Fr 03 Feb 2017 21:34:32 CET, Ivan Gomez wrote:


Hello everyone,

I have a question about X2Go dependencies. What is the fuse-sshfs  
package used for? Will X2Go stop working if I remove it from my  
system?



Thank you for your time,

Ivan Gomez


sshfs is used for client-side printing from within X2Go sessions and  
for mounting local folders and/or devices into the X2Go session.


If you don't need those features, it is ok to uninstall sshfs.

Mike
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Re: [X2Go-User] Upgrading to nx-libs 3.5.99.1

[Mike Gabriel]

Yes, correct!
Mike

On Wed Sep 21 14:32:40 2016 GMT+0200, Mike DePaulo wrote:
> Hi MIke#1,
> 
> It looks like users have to upgrade to x2goserver 4.1.0.0, currently
> unreleased, in order to get the new x2goserver-x2goagent package for
> use with nx-libs 3.5.99.1. Is that correct?
> 
> If that is true, then Robert needs to use this PPA:
> https://launchpad.net/~x2go/+archive/ubuntu/ppa
> 
> -Mike
> 
> On Wed, Sep 21, 2016 at 1:58 AM, Robert Dinse  wrote:
> >
> >  Still stuck:
> >
> > apt-get install x2goagent
> > Reading package lists... Done
> > Building dependency tree
> > Reading state information... Done
> > Some packages could not be installed. This may mean that you have
> > requested an impossible situation or if you are using the unstable
> > distribution that some required packages have not yet been created
> > or been moved out of Incoming.
> > The following information may help to resolve the situation:
> >
> > The following packages have unmet dependencies:
> >  x2goagent : Depends: nxagent (< 2:3.5.0.32-0~668~ubuntu16.04.1.1)
> > E: Unable to correct problems, you have held broken packages.
> > root@ftp:~# apt-get install nxagent
> > Reading package lists... Done
> > Building dependency tree
> > Reading state information... Done
> > nxagent is already the newest version
> > (2:3.5.99.1-0.1+git20160913.1427+16.04.release.1).
> > 0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
> >
> >
> > -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-
> >  Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting.
> >Knowledgeable human assistance, not telephone trees or script readers.
> >  See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874.
> >
> > On Tue, 20 Sep 2016, Mike DePaulo wrote:
> >
> >> Date: Tue, 20 Sep 2016 09:48:29 -0400
> >> From: Mike DePaulo 
> >> To: Robert Dinse 
> >> Cc: "x2go-user@lists.x2go.org" 
> >> Subject: Re: Upgrading to nx-libs 3.5.99.1
> >>
> >> As of nx-libs 3.5.0, libnx-x11 is a transitional dummy package and can
> >> be safely removed.
> >>
> >> As of nx-libs 3.6 beta, libnx-x11 no longer exists.
> >>
> >> So run:
> >>
> >> sudo apt-get purge libnx-x11
> >> sudo apt-get install libnx-x11-6
> >>
> >> -Mike
> >>
> >> On Tue, Sep 20, 2016 at 12:12 AM, Robert Dinse  wrote:
> >>>
> >>>
> >>>  I am trying to upgrade another Ubuntu server after having done so
> >>> successfully on one but I am getting stuck at:
> >>>
> >>> apt-get install libnx-x11
> >>> Reading package lists... Done
> >>> Building dependency tree
> >>> Reading state information... Done
> >>> Some packages could not be installed. This may mean that you have
> >>> requested an impossible situation or if you are using the unstable
> >>> distribution that some required packages have not yet been created
> >>> or been moved out of Incoming.
> >>> The following information may help to resolve the situation:
> >>>
> >>> The following packages have unmet dependencies:
> >>>  libnx-x11 : Depends: libnx-x11-6 (< 2:3.5.0.32-0~668~ubuntu16.04.1.1)
> >>> but
> >>> 2:3.5.99.1-0.1+git20160913.1427+16.04.release.1 is to be installed
> >>> E: Unable to correct problems, you have held broken packages.
> >>> [...]
> >>
> >>
> >
>

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Re: [X2Go-User] Upgrading to nx-libs 3.5.99.1

[Mike Gabriel]

Hi Robert,

On  Mo 19 Sep 2016 14:44:54 CEST, Mike DePaulo wrote:


I'm glad to hear about the 1st part. :)

Mike#1, can you comment on the 2 dependencies?


 However, it breaks any of the x2goserver-pyhoca and x2goserver-compat
can not be installed because of unmet dependencies.  More concerned about
the compat since some of my customers insist on running antique versions of
software and getting them to ugprade is like pulling teeth.  Actually,
pulling teeth is easier.


Don't worry about x2goserver-pyhoca and x2goserver-compat. Both  
packages are noop packages by now (and have been for a long time).  
They should be removed from X2Go Server IMHO. Even for the 4.0.1.x  
release series of X2Go Server.


;-)
Mike
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Re: [X2Go-User] [X2Go-Project] Upcoming Deprecation of EOL Distributions

[Mike Gabriel]

Hi Robert,

switching to x2go-user context as being OT on x2go-project.

On  Do 25 Aug 2016 06:48:53 CEST, Robert Dinse wrote:


Can't figure out where mate has start up scripts.  The mate-session
start up is a binary.  There is an /etc/mate/xrandr directory with  
no contents

and no man page.  It does not source .bashrc or .profile.



On Debian and Ubuntu machines, we inject some MATE branding in  
/etc/X11/Xsession.d/, basically by injecting another path into  
$XDG_DATA_DIRS (/usr/share/mate).


In that directory, you can find some tweaks for default applications  
and such (debian-mate-default-settings or ubuntu-mate-default-settings  
by package name).


For autostarting applications, MATE strictly follow the XDG specs by  
freedesktop.org.


Hope that helps,
Mike (with his Debian MATE maintainer hat on)
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Re: [X2Go-User] How updated is the x2go browser plugin capability?

[Mike Gabriel]

Hi James,

On  Do 25 Aug 2016 16:11:50 CEST, James M. Pulver wrote:


Is this intended to eventually replace X2Go?

James Pulver
CLASSE Computer Group
Cornell University



No, it is not intended to replace X2Go. X2Go will continue to exist  
and is currently actively maintained. Arctica Project will bring forth  
a new project with similar functionality, but not as a replacement. It  
will be another product, suitable as alternative to X2Go.


The group of developers partially overlaps. Also people from Qindel in  
Spain (their product is called TheQVD) are involved here, too (a third  
solution). The Qindel Group currently sponsors great portions of the  
development done in the Arctica Project.


Thanks+Greets,
Mike
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Re: [X2Go-User] x2go plasma 5 support

[Mike Gabriel]

On  Di 16 Aug 2016 13:38:28 CEST, Samuel Bernardo wrote:



I can use x2go for remote session with plasma 5, besides the crashes
that happens with kdeinit after login and with plasmashell when trying
logout.


How do you work around the kdeinit crash (caused by an X11 proto call  
to Xinput2 extension, which is non-present in x2goagent)?


Mike (one of the maintainers of nx-libs)
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Re: [X2Go-User] Ubuntu 16.04 LTS

[Mike Gabriel]

Hi Robert,

On  Sa 23 Apr 2016 20:22:15 CEST, Robert Dinse wrote:


At this point I'm reverting to 15.10 so will need to continue this
experiment a few months from now.  Apache 2.4.21 was working and five hours
or so into running stopped.  It was wedged in some manner that even killing
all the processes and restarting wouldn't fix.  A reboot did but obviously
I don't want to be rebooting the server all the time so I am going back to
15.10.  I made an image before I upgraded.  Going to wait a few months for it
to stablize and try again.


It mostly is a good advise to wait for 6 months with Ubuntu  
dist-upgrades to allow it to settle.


Esp. if the LTS is released at a stage where Debian unstable is an  
open construction site.


Greets,
Mike (with my DD hat on)
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Re: [X2Go-User] Video

[Mike Gabriel]

Hi Orion,

On  Fr 26 Feb 2016 17:26:17 UTC, Orion Poplawski wrote:


I'm having a lot of trouble getting a gstreamer based video player to work
under X2Go.


Ok... Have you ever tried the mTelePlayer? Consider it as a preview of  
multimedia support in Arctica Server / Client which we are currently  
working on with pressure.



First off it looks like Xv is not supported.  Is that something
that ever will be?


I heard from the people from TheQVD, that they have working on a Xv  
extension in mind for 3.7.x of nx-libs.



Next thing I'm seeing with the parole player is that the
video frame goes black when I pause it.  I'm also trying to use the fluendo
gstreamer codecs and seeing segfaults (apparently in the fluendo code) when
using dragon player to watch videos.


Hard to say what"s causing this without further introspection.


I'm running with current nx-libs git from
https://github.com/ArcticaProject/nx-libs.  EL7 server and client.


Do things change when going back to nx-libs 3.5.x?

Mike

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Re: [X2Go-User] Reconnect to session

[Mike Gabriel]

Hi Michael,

On  Sa 05 Mär 2016 17:38:00 CET, Michael Eager wrote:


Anyone have any idea why I am unable to reconnect to a running session?



For debugging pyhoca, it is better to provide debug output. Use  
--libdebug on the cmdline.




At another time, when I connected to a server using x2goclient, it created
a new session, rather than re-connecting to the suspended session which was
running.  When I tried to connect to the suspended session, nothing  
happened.

The GUI went blank and no X screen was displayed.

Questions:

1 -- How can I connect to a session which is marked as running?


I am not fully sure if that is supported (I can't remember if I  
implemented that). You may try what I write further down under point  
3. PyHoca-GUI has a feature called "Transfer session" which basically  
is a suspend + pause a bit + resume.



2 -- How can I suspend a session which is running?


(1) from inside the session: x2gosuspend-session
(2) from external (as same user) via ssh user@server  
x2gosuspend-session 



3 -- How can I connect to a suspended session on a server?


Check the pyhoca-cli man page and search for "--resume".


4 -- How can I specify the session to connect to using the pyhoca-cli CLI?


See point 3.

Mike

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Re: [X2Go-User] KDE5 Support

[Mike Gabriel]

Hi Stefan,

On  Mo 09 Nov 2015 18:24:09 CET, Stefan Baur wrote:


Am 09.11.2015 um 17:53 schrieb Babernits Wilhelm (LDBV):


what about KDE 5 support? Is it even possible?


As explained in our fine Wiki at
http://wiki.x2go.org/doku.php/doc:de-compat#compatibility_and_workaround
s_depend_on_what_version

"KDE 5: Incompatible due to plasmashell requiring GLX 1.3"

Let's hear from the developers if it's possible to upgrade to GLX 1.3,
if yes in what time frame, and what manpower/effort/sponsorship costs
that would mean.


My latest tests have shown that KDE5 crashes at the moment because it  
tries to use the Xinput2 in the nxagent Xserver, which is not present  
(only Xinput(1)).


My sense is that KDE5 works well without GLX 1.3 (whereas GNOME3 and  
Unity7 do not).


Greets,
Mike
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Re: [X2Go-User] PyHoca-GUI Can't Find Home Directory

[Mike Gabriel]

Hi Matt.

On  Di 20 Okt 2015 17:18:36 CEST, Matt Fornero wrote:


Hello,

I am trying to use PyHoca-GUI to connect from my Windows 7 machine to
my Linux machine. Whenever I try to do so, I get the following message:

"The remote user's home directory does not exist"

I am able to connect using the standard X2Go client and ssh without any
issues. Any ideas what could be causing this?

Here are the versions I'm using:

PyHoca-GUI: 0.5.0.4
X2go: 4.0.5.0

Server: 4.0.1.15-0x2go1+git20140615.847+wheezy.main.1



The code that checks your home [1] is this:

"""
def home_exists(self):
"""\
Test if the remote home directory exists.

@return: C{True} if the home directory exists, C{False} otherwise
@rtype: C{bool}

"""
(_stdin, _stdout, _stderr) = self._x2go_exec_command('stat  
-tL "%s"' % self._x2go_remote_home, loglevel=log.loglevel_DEBUG)

if _stdout.read():
return True
return False

"""

What does 'stat -tL $HOME' result in when executed on the X2Go Server  
under the remote user account that cannot log in via PyHoca-GUI?


Mike

[1]  
http://code.x2go.org/gitweb?p=python-x2go.git;a=blob;f=x2go/backends/control/plain.py;h=8ecc09de7f4eea5764a6bffa1970660334963856;hb=d91770321482850e45d2fc8d5f2daec127ecf7aa#l1238

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Re: [X2Go-User] PyHoca-GUI Can't Find Home Directory

[Mike Gabriel]

Hi Matt,

On  Do 22 Okt 2015 17:12:35 CEST, Matt Fornero wrote:


Hi Mike,

Thanks for the response. I did take a look at the code, but couldn't find
anything obvious


The code that checks your home [1] is this:

"""
 def home_exists(self):
 """\
 Test if the remote home directory exists.

 @return: C{True} if the home directory exists, C{False} otherwise
 @rtype: C{bool}

 """
 (_stdin, _stdout, _stderr) = self._x2go_exec_command('stat -tL
"%s"' % self._x2go_remote_home, loglevel=log.loglevel_DEBUG)
 if _stdout.read():
 return True
 return False

"""

What does 'stat -tL $HOME' result in when executed on the X2Go Server
under the remote user account that cannot log in via PyHoca-GUI?



I get the following response:

% stat -tL $HOME
/home/mfornero 24576 56 41c0 9281 101 25 5490934 73 0 0 1380167700  
1445526133 1445526133 0 65536


I see this either logging in the standard x2go client or via a ssh session.


Please also check the actual content/value of self._x2go_remote_home  
at runtime.


This can be done by adding a

print "DEBUG::: %s" % self._x2go_remote_home

to the above code. Then run pyhoca-gui from the command line and watch  
for the line starting with "DEBUG:::"...


Mike

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[X2Go-User] Launchpad cleanup

[Mike Gabriel]

Hi all,

on request of the Ubuntu MATE team I have enabled automatic builds for  
X2Go packages for Ubuntu 15.10.


Builds are pending and should appear during the day.

Furthermore, I have removed packages for all non-supported Ubuntu  
versions from the X2Go PPAs (i.e., packages for Ubuntu 10.04 (lucid)  
and Ubuntu 14.10 (utopic).


light+love,
Mike
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Re: [X2Go-User] [x2go][pyhoca-cli] - Reparent windows using xembed

[Mike Gabriel]

Hi Antenore,

I am the main upstream dev of PyHoca.

On  Mi 15 Jul 2015 09:44:52 CEST, Antenore Gatta wrote:


Hi all,

I'm one of the main Remmina contributors, a C/GTK application used to
connect to a remote server using different protocols.

We have an NX plugin, that I'm even not sure is working, so I decided
to write an X2Go plugin.

So far so good, I was able to implement a kind of wrapper around
pyhoca-cli, but as I'm far to be a good developer, I'm having some hard
time to try to embed/reparent, the X2Go windows inside our GTK
container.

This is usually achieved implementing the Xembed protocol, on both side
and for what I can see/understand, X2Go, or at least Pyhoca-cli,
doesn't.

Am I wrong? In the case would it be possible to implement or are you
aware of any other approach of doing it?

Some references:

https://github.com/FreeRDP/Remmina/tree/x2goplugin
https://github.com/FreeRDP/Remmina/tree/x2goplugin/remmina-plugins/x2go
The xterm -into windowID it's just to showcase the fact that the
reparenting works.

http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html

https://developer.gnome.org/gtk3/unstable/GtkSocket.html

Thanks a lot for your precious work and support!


As you have NX embedding working, something similar should be doable  
with X2Go. Under the hood, PyHoca-CLI calls the nxproxy binary.


How do you handle embedding in the NX plugin from remmina?

Greets,
Mike

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Re: [X2Go-User] [INTERNET] Re: Re: x2gobroker resume session

[Mike Gabriel]

Hi Franck,

On  Di 02 Jun 2015 11:30:16 CEST, BOTZ Franck (Administrateur Systèmes  
et Réseaux) - DDT 67/SIDSIC/Pôle Infra wrote:



  * broker
* x2gobroker-sessionprofiles.conf
  * host=HostName of the server (if I use IP the resume function  
 did not work)


You can also use

  host=HostName (IP-Address)

e.g.

  host=server2 (192.168.2.52)

For load balancing

  host=server1 (192.168.2.51), server2 (192.168.2.52)

If your DNS system is whacky or DNS is different from /etc/hostname  
(e.g., people connect via a gateway), then you can do this:


  host=server1 (gateway.company:22051), server2 (gateway.company:22052)

Where server1 and server2 are the actual hostnames of the X2Go Servers  
and the host address in parentheses (gateway.company:port) is the  
host address under which the X2Go Servers can be contacted by the  
client.


Greets,
Mike

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Re: [X2Go-User] [INTERNET] Re: x2gobroker resume session

[Mike Gabriel]

Hi Franck,

On  Mo 01 Jun 2015 09:49:10 CEST, BOTZ Franck (Administrateur Systèmes  
et Réseaux) - DDT 67/SIDSIC/Pôle Infra wrote:



Hi Mike

I'm very happy to see your message !! I test it for 10 days and  
can't see the resume function working properly.


I connect on the broker with this command : x2goclient  
--borker-url=ssh://10.0.0.XXX/usr/bin/x2gobroker

The server run xfce desktop

When I launch the command i Never see the box which permit to choose  
resum/supend/or create a new session.


Why ?



Maybe because there is a package named x2gobroker-ssh providing  
/usr/bin/x2gobroker-ssh. I presume you log into the session broker as  
the user who also shall launch the session (and not as the  
x2gobroker system user).


That x2gobroker-ssh binary is a wrapper that sets the correct  
permissions (setuid x2gobroker for all members of the group  
x2gobroker-users). Unfortunately, this hack is necessary when using  
the SSH brokerage functionality in relation with the x2gobroker-agent.


Regards,
Mike




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Re: [X2Go-User] x2gobroker resume session

[Mike Gabriel]

Hi Franck,

On  Fr 29 Mai 2015 11:29:45 CEST, BOTZ Franck (Administrateur Systèmes  
et Réseaux) - DDT 67/SIDSIC/Pôle Infra wrote:



I use the nightly build on a 14.04 Ubuntu

Could anyone confim me that resuming/suspending a session is  
functionnal trough a broker ?


I can resume/suspend a session directly to a x2goserver but i can't  
with the broker.


Resume+Suspend works with the broker version in the nightly builds.

It requires x2gobroker-agent to be installed on X2Go Servers.

It requires a working x2gobroker - x2gobroker-agent setup.

It requires a running x2gocleansessions script on the X2Go Servers  
(which needs to be activated on non-Debian based installations of X2Go  
IIRC).


It requires agent-query-mode=SSH (or LOCAL) to be set in  
/etc/x2go/x2gobroker.conf,
... or broker-agent-query-mode=SSH (or LOCAL) to be set in invididual  
session profiles.


Regards,
Mike
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Re: [X2Go-User] Help with X2go Session Broker auth

[Mike Gabriel]

Hi Michael,

On  So 24 Mai 2015 20:12:14 CEST, Michael Gale wrote:


Hello,

I have been reviewing the docs here:
http://wiki.x2go.org/doku.php/doc:installation:x2gobroker

and am interested in:
Furthermore, X2Go Session Broker can be extended by other (non-PAM)
authentication methods. The currently available authentication mechanisms
in X2Go Session Broker are listed here
http://code.x2go.org/gitweb?p=x2gobroker.git;a=tree;f=x2gobroker/authmechs
.

However I am unable to find out how to enable one of the following examples:
http://code.x2go.org/gitweb?p=x2gobroker.git;a=tree;f=x2gobroker/authmechs

I have a custom web app I need to authenticate users against and would like
to use: https_get_authmech.py
http://code.x2go.org/gitweb?p=x2gobroker.git;a=blob;f=x2gobroker/authmechs/https_get_authmech.py;h=c4c25999a28d526845d1c64f80eea64f80fbf60a;hb=HEAD

Thanks
Michael


Authentication mechanisms are enabled and configured in  
/etc/x2go/x2gobroker.conf [1,2,3]. Please study x2gobroker.conf  
thoroughly, because it provides a great deal of documentation.


Mike

[1]
http://code.x2go.org/gitweb?p=x2gobroker.git;a=blob;f=etc/x2gobroker.conf;h=11cb0eadb493ceb0976bce53795da73c466eb832;hb=9fcb404070c352dd34f09f5e078c8970c3b236b8#l105
[2]  
http://code.x2go.org/gitweb?p=x2gobroker.git;a=blob;f=etc/x2gobroker.conf;h=11cb0eadb493ceb0976bce53795da73c466eb832;hb=9fcb404070c352dd34f09f5e078c8970c3b236b8#l310
[3]  
http://code.x2go.org/gitweb?p=x2gobroker.git;a=blob;f=etc/x2gobroker.conf;h=11cb0eadb493ceb0976bce53795da73c466eb832;hb=9fcb404070c352dd34f09f5e078c8970c3b236b8#l342


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Re: [X2Go-User] Broker installation

[Mike Gabriel]

Hi Franck,

On  Di 19 Mai 2015 18:35:54 UTC, BOTZ Franck (Administrateur Systèmes  
et Réseaux) - DDT 67/SIDSIC/Pôle Infra wrote:



I found that :
  * if i use a broker url like ssh://... , the session could be  
close with no problem

  * if https://... is used, closing session will hang.

Any idea ?

Regards

Franck


do you have the x2goserver-xsession package installed? It seems that  
the session (x2goagent process) does not get cleaned-up properly.


Without debug logs, I can only guess what happens (but actually have  
no idea at the moment).


Mike
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Re: [X2Go-User] [INTERNET] Re: Broker installation

[Mike Gabriel]

Hi Franck,
(re-adding x2go-user ML to Cc:)

On  Mo 18 Mai 2015 21:02:51 CEST, BOTZ Franck (Administrateur Systèmes  
et Réseaux) - DDT 67/SIDSIC/Pôle Infra wrote:



Thanks ! It works . but not completely

I put the nigtly version on the broker, server and client. I move  
the server to a postgresql database.


The client connect perfectly to the server.

When I try to connect trough the broker :
  * I see the server
  * I can open a session on it
  * the unity dash does is invisible but works
  * the session open and 5 or 6 window are launched with a ? as icon
  * the bar on the top is sparkling
  * It is not possible to close session

Any idea ?

Regards

Franck


These commits [1,2] should fix your issue. The broker presumes that  
desktop session commands (command=...) are given in uppercase letters.  
I have now added code to x2gobroker, that also allows desktop session  
commands to be lower or mixed case.


Nightly builds should be available within the next 24h.

Greets,
Mike

[1]  
http://code.x2go.org/gitweb?p=x2gobroker.git;a=commitdiff;h=46784d16a43eebe3b90090d8d1aafb69d9e37ccf
[2]  
http://code.x2go.org/gitweb?p=x2gobroker.git;a=commitdiff;h=9fcb404070c352dd34f09f5e078c8970c3b236b8

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Re: [X2Go-User] Broker installation

[Mike Gabriel]

Hi Franck,

On  Di 19 Mai 2015 11:24:27 CEST, BOTZ Franck (Administrateur Systèmes  
et Réseaux) - DDT 67/SIDSIC/Pôle Infra wrote:



Hi Mike

Thanks for this quick commit. I will test it tomorrow.

I found how to open a session with
  * no sparkling windows
  * top bar available
  * dash visible

in x2gobroker-sessionprofile.conf
  * type=Custom Desktop
  * command=unity

If type=UNITY, the windows sparkling and the session in usuable.

But I can't close the session properly. The dash, the top bar will  
be closed. But the windows stay open with the background picture.  
After 15mn the situation don't change.


Ok...

I test to move the backend database to sqlite to verify if it is a  
database issue but i can't  change it. When i connect i have an  
internal server error.


I am sure that your issues could be solved quickly. Instead of mailing  
to and fro, I suggest contracting me as a consultant on this for 1-2  
hours.


I currently don't have the time to discuss all those issue.

Please dive into the debugging of X2Go [1] or call me in as a consultant.

Sorry+Thanks,
Mike

[1] http://wiki.x2go.org/doku.php/wiki:development:debugging

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Re: [X2Go-User] Broker installation

[Mike Gabriel]

Hi Franck,

please use the X2Go Session Broker from the nightly builds of X2Go.

  ppa:x2go/ppa


On  Mo 18 Mai 2015 10:11:59 CEST, BOTZ Franck (Administrateur Systèmes  
et Réseaux) - DDT 67/SIDSIC/Pôle Infra wrote:



Hi !

I'm new in x2go installation/utilisation.

I start with install a x2go server on a precise distribution
  * add precise repository : OK
  * Install x2goserver : OK
  * Open a session with a client an a local/winbind username : OK
  * Start application : OK
  * Resume a session from an other client an a local/winbind username: OK
  * Start a session from a client with an ADSL connexion : OK

This first exprience is very great !! The next step is to install a  
broker and connect it the server.



[...]


A release is pending and will likely appear end of June 2015. Try the  
below again and get back to this list, if things still fail.


Mike

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Re: [X2Go-User] Newbie question: What is x2go's relationship to VcXsrv?

[Mike Gabriel]

Hi David,

On  Mo 11 Mai 2015 10:56:35 CEST, David Aldrich wrote:


Hi

I use VcXsrv and have just come across x2go.

Please will someone explain if there is any relationship between  
x2go and VcXsrv?


Why might I want to use x2go instead of VcXsrv?

(I work on a Windows 8.1 machine and want to access GUI apps on  
Linux machines).


Best regards

David


X2Go uses NX technology which requires an XServer on the client-side host.

In X2Go the setup is this:

  o (Windows) client-side: VcXsrv
  o client-side: nxproxy
  o server-side: nxagent (aka x2goagent) (Xserver where the X2Go session
runs in).

X2Go Client bundles VcXsrv and ships it in its installer. As we  
experienced long delays with security fixes in the upstream VcXsrv the  
X2Go project's and the Arctica Project's (working on a remote desktop  
solution write-up from scratch) team chose to maintain its own  
branch/version of VcXsrv [1].


You can use VcXsrv to run local X11 and remote X11 application via the  
normal X11 protocol. X2Go utilizes NX technology, which is used for  
starting remote X11 application, but the NX protocol does several  
things for optimizing the application's smoothness when it comes to  
low bandwidth connections.


Mike

[1] https://github.com/ArcticaProject/vcxsrv
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Re: [X2Go-User] http proxy connection

[Mike Gabriel]

Hi Catarina,

On  Mo 04 Mai 2015 14:32:08 CEST, Caterina Piazza wrote:


Dear List,

I'm trying to use X2go client with a http proxy connection. In the  
session options I selected the Use proxy server for connection and  
the type HTTP, I entered the proxy port and address but when I  
start the session I always get this error: cannot connect to proxy  
server.


What it's wired is that even if I selected the http option when I  
try to start the session a window opens asking for the password for  
the SSH proxy.


Are there any problems with the http proxy connection? Can I use  
X2go client with this type of connection?


The http proxy option has not been well tested at all. It should work  
in theory with some recent libssh version underneath, but it is not  
getting tested regularly on new release. It may well be that a  
regression in the SSH/HTTP proxy code has happened and is causing the  
SSH passphrase pop up dialog on proxy connection attempts.


Greets,
Mike
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Re: [X2Go-User] Can X2GO do pixel-doubling? (client- or server-side)

[Mike Gabriel]

Hi Felix,

On  Mo 27 Apr 2015 13:40:52 CEST, Felix E. Klee wrote:


On Mon, Apr 27, 2015 at 12:28 PM, Mike Gabriel
mike.gabr...@das-netzwerkteam.de wrote:

In shadow mode (desktop sharing), NX 3.x can do some scaling of the
remote/shadowed desktop.


*Why do you say some? Can it scale by 200%?*


Yes. I think so.


Maybe this fits your use case.


Actually I prefer individual windows to be managed by the guest’s WM. So
sharing the entire desktop is not optimal. It’s what I would get with a
VNC solution as well.


Ok. I get that.


*In shadow mode, would X2Go still perform better than VNC? Or would it
also just send pixel data?*


It uses the Xdamage and Xtst / Xrecord  extension in X11 which  
basically is an X11-like VNC, I guess.


Mike

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Re: [X2Go-User] Can X2GO do pixel-doubling? (client- or server-side)

[Mike Gabriel]

hi,

On  Mo 27 Apr 2015 10:55:18 CEST, Felix E. Klee wrote:


On Mon, Apr 27, 2015 at 2:06 AM, Mihai Moldovan io...@ionic.de wrote:

Lowering the DPI value should approximately give you what you want


That's like adjusting DPI in X. Only some applications listen to it,
and normally it only affects font size. What I need is dumb pixel
doubling. This is also important for working with low-res desktops on
HiDPI screens, so I am optimistic that X2GO will support it one day.
NoMachine may support it already.


You could launch a session (local X11 or X2Go) and launch a second  
session via X2Go desktop sharing (Connect to local desktop as  
session type in X2Go Client).


In shadow mode (desktop sharing), NX 3.x can do some scaling of the  
remote/shadowed desktop. Maybe this fits your use case.


Mike
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Re: [X2Go-User] switch to terminal empties clipboard

[Mike Gabriel]

HI Swizzly,

On  Fr 24 Apr 2015 09:26:05 CEST, swizz ly wrote:


 Hi,
 
I further analysed the problem with xev, and it seems to be a vcxsrv
problem. Switching from a windows application to the gnome-terminal vcxsrv
adds an additional /MotionNotify/ event between the /ButtonPress/ and
/ButtonRelease/ events, which triggers the line selection in
gnome-terminal.
I filed a bug report to vcxsrv: https://sourceforge.net/p/vcxsrv/bugs/25/
 
Swizzly


our (X2Go project, Arctica project) VcXsrv maintainer actually runs a  
forked branch for X2Go-specific problems in VcXsrv on Github [1].


We experienced bad response habbit with the original VcXsrv maintainer  
on SourceForge, so we decided to maintain a separate branch (with  
immediate CVE fixes and an appropriate reaction time on bug  
submissions).


Maybe you want to dump your bug report there, as well.

Mike

[1] https://github.com/ArcticaProject/vcxsrv
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Re: [X2Go-User] pyhoca in Ubuntu 14.04 LTS with Unity

[Mike Gabriel]

Hi Ulrich,

On  Do 23 Apr 2015 18:08:29 CEST, Ulrich Moser wrote:


I tried to launch the pyhoca-gui on my Ubuntu box but it did not go to
the panel. So I searched for a solution and found the hints on

http://wiki.x2go.org/doku.php/doc:usage:pyhoca-gui.

But unfortunately the hint to use

gsettings set com.canonical.Unity.Panel systray-whitelist ['all']

does not work in Unity on Trusty as there is no entry
com.canonical.Unity.Panel in the gsettings. Using dconf-editor I tried
to find whether there is something similar or whether it had been moved
into another tree but there is no node for Panel in no tree.

Regards

Ulrich


unfortunately, PyHoca-GUI does not work on Unity = 12.04 (or so).  
Unity at some stage dropped systray area support completely in favor  
of the appindicator notification area.


However, the underlying wxPython of PyHoca-GUI does not support  
taskbar icons via libappindicator.


Sorry for that. Maybe you find it sufficient to use pyhoca-cli from  
the command line? Or switch to a non-Unity desktop like e.g. MATE  
desktop (client-side)?


Greets,
Mike
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Re: [X2Go-User] communication between local and remote (seamless) applications

[Mike Gabriel]

Hi,

On  Fr 17 Apr 2015 17:22:00 CEST, Philipp Höfflin wrote:


with a mixture of locally running applications and seamlessly started
remote apps, is there a way of communication between the two? We have a
usecase with one application running on a remote machine in
x2go-seamless mode. This remote app needs to pass some information to
the local system, like e.g. passing an email address back that should be
handed to the local mail client.

Any hints for further investigation or maybe APIs that could be used to
build that kind of information passing?


At the moment there is no means of communication between local and  
server-side pub apps.


In Python X2Go (PyHoca-GUI) there is a feature called MIME type drop  
box. You can drop a file to some server-side folder and it gets opened  
on the client (works on Windows and Linux).


But what you suggest is actually a deeper approach of  
inter-application communication, right?


Mike
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Re: [X2Go-User] desktop compatibility question

[Mike Gabriel]

Hi Neal,

On  Mi 25 Mär 2015 13:04:07 CET, Neal Becker wrote:


I looked here:
http://wiki.x2go.org/doku.php/doc:de-compat

Is this talking about the client-side (my laptop) or the server-side
(remote)?


Server-side, of course.

Greets,
Mike
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Re: [X2Go-User] Session Resume fails with 4.0.1.19-0~1062~ubuntu14.10.1

[Mike Gabriel]

Hi Gerald,

On  Sa 14 Mär 2015 13:38:02 CET, richter wrote:


Hio Mike,



this is not true. With 4.0.1.19, we have started providing upstream  
builds for

openSUSE 13.1 and 13.2.

However, the documentation [1] still requires an update to make it look like
what can be found for the nightly builds [2].

Mike

[1] http://wiki.x2go.org/doku.php/wiki:repositories:suse


That is the url I was using so far, but also after zipper refresh it  
still shows 4.0.1.15 and not 4.0.1.19:




yeah, I know. That location is not continuously maintained and it  
should be removed from the wiki.


Adapt the repo file from the other URL (nightly builds) to download  
from the stable builds (replace heuler by main).


Mike
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Re: [X2Go-User] Session Resume fails with 4.0.1.19-0~1062~ubuntu14.10.1

[Mike Gabriel]

Hi Gerald,

On  Fr 13 Mär 2015 07:06:34 CET, richter wrote:


I am using x2go for a long time with x2goserver 4.0.1.15 on OpenSuSE 13.1
without problems, but there are no updated packages for OpenSuse


this is not true. With 4.0.1.19, we have started providing upstream  
builds for openSUSE 13.1 and 13.2.


However, the documentation [1] still requires an update to make it  
look like what can be found for the nightly builds [2].


Mike

[1] http://wiki.x2go.org/doku.php/wiki:repositories:suse
[2]  
http://wiki.x2go.org/doku.php/wiki:development:nightly-builds#nightly_builds_for_opensuse_suse_linux_enterprise

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Re: [X2Go-User] Questions about sessions

[Mike Gabriel]

Hi,

- Original message -
 On Thu, Mar 5, 2015 at 2:08 AM, Mike Gabriel
 mike.gabr...@das-netzwerkteam.de wrote:
  
  I agree with Mihai, that it is awkward, landing in a session that one
  maybe does not want. I often run multiple sessions of the same desktop
  type for the same user.
 
 Don't you run into trouble with applications clobbering their own
 hidden files or things like firefox launching what you expected to be
 a new instance as a window in one of the suspended sessions instead?
   And when reconnecting, how do you distinguish which session you want?

The simple answer is: I use PyHoca-GUI. That makes things much easier.

And, I am good at remembering session Ids and numbers.

Mike


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Re: [X2Go-User] PyHoca-GUI: Logon script for published apps

[Mike Gabriel]

Hi Milan,

On  Mo 23 Feb 2015 18:29:54 CET, Milan Knížek wrote:


Hello,

I'll would like to have some scripts run after login to the server
(through PyHoca-GUI, neither an app or full desktop is autorun).

(In the particular case, it should add keys to the kernel keyring for
the given session so that the user is able to access network CIFS
multiuser-mounts via systemd.automount just by accessing the mount
point).

What is the correct location to drop the script (bash)?

I can see /usr/lib/x2go/extensions/post-start.d exists: is it intended
for this purpose?


I'd use /usr/lib/x2go/extensions/pre-runcommand.d.


If so, is it functional to use the equivalent structure in /etc/x2go
(system-wide) or even /home/user/.x2go directories?


Neither gets looked at by the X2Go Server scripts. Only  
/usr/lib/x2go/extensions is relevant.


Note that this scripts are not intended to be configurable. Rather as  
an extension provider for X2Go, you can drop your code into the  
extensions dir (via a .deb / .rpm package).


Mike

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Re: [X2Go-User] Testers Wanted: PyHoca-GUI for Windows 0.5.0.4-20150125

[Mike Gabriel]

Hi Milan,

On  Di 17 Feb 2015 15:58:29 CET, Milan Knížek wrote:


BTW, it would be nice if the debug log file is stored inside the
--sessions-rootdir so that files are kept within the portable
definitions.


It would be fabulous, if you could file this as a bug against  
pyhoca-gui. I will forget that otherwise. If you (and not I) submit  
the bug, you will get informed once it is fixed (that is the advantage  
of you filing the bug).


Thanks+Greets,
Mike

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Re: [X2Go-User] X2GO on Mac very unstable

[Mike Gabriel]

On  Fr 06 Feb 2015 20:51:52 CET, Luc Turbide wrote:


Hi,

I would to known is someone has problem with X2GO and Mac OS X.  
I try to use X2GO on Centos 6.6 (x2goserver 4.0.1.18-5) or CentOS 7  
(x2goserver 4.0.1.18-5). Mac run 10.10.2 (but same problem with  
10.10.0 and 10.10.1) with X2goClient 4.0.3.1-20150131 (same problem  
with all version).


Problem 1: Freeze all the time after some minute of work. I need  
to kill X2GOClient on Mac.


Problem 2: Shared Folder do not work. When I did “df” on Linux,  
the freeze and I have timeout. Disk is mount but I can not access to  
him.


You have to make sure that SSH daemon on the Mac system is running and  
working.


Normally, if you never SSH'ed into that Mac, you don't have a host  
key. Unfortunately, host key creation does not get triggered via X2GO  
Client when sharing a client-side folder (this feature requires a  
client-side SSH daemon on the Mac to be functional).


SSH into your Mac from remote just once and then chance should be  
better that folder sharing works later on in X2Go Client.



Problem 3: Try print client but page never arrive on Mac...


Same issue as with folder sharing (the client-side printing feature is  
a shared folder for print jobs).


So someone known good combination client/server for work with  
Mac/Linux? Someone has same problem?


Basically, the Mac OS X version of X2Go Client has always needed more  
love than available by the devs. The X2Go project received a donation  
recently that will help getting Mac OS X issues fixed in the near  
future, I hope.


Mike
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Re: [X2Go-User] Building x2goclient from sources

[Mike Gabriel]

Hi Kermit,

On  Mo 26 Jan 2015 18:48:42 CET, Short, Kermit wrote:


Greetings!
   I am trying to build the client from source tarballs.  I am  
following the steps outlined at
   
http://wiki.x2go.org/doku.php/wiki:development:build-howto-linux:x2goclient

   I have downloaded and untarred the nx-libs_3.5.0.13 full tarball.


That tarball is rather old. We are at 3.5.0.28 at the moment. You only  
need the nx-libs-lite tarball for X2Go's client-side software  
components (X2Go Client, PyHoca-*). [1]



   after I
  cd nx-libs_3.5.0.13/nxproxy
  autoconf
  ./configure --prefix=/custom
  make


Extract that tarball and run

  make  sudo make install

That should be it. See the shipped-with Makefile for details.

Mike

[1] http://code.x2go.org/releases/source/nx-libs/nx-libs-3.5.0.28-lite.tar.gz


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Re: [X2Go-User] Testers Wanted: PyHoca-GUI for Windows 0.5.0.3-20150124

[Mike Gabriel]

Hi Michael,

On  So 25 Jan 2015 14:12:07 CET, Michael DePaulo wrote:


On Sun, Jan 25, 2015 at 3:31 AM, Kristof Hardy
kristof.ha...@catsanddogs.com wrote:



Hi Mike,

thanks for the new release. I just updated and looks like I can't connect
anymore.

I get an error on launching my Mate desktop: An unknown error occured during
authentication!
(I'm using pubiuc key authentication and I'm on Win8.1)

It worked fine with the previous version I used:
http://code.x2go.org/releases/binary-win32/pyhoca-gui/previews/0.5.0.0/PyHoca-GUI_0.5.0.0-pre02_win32-setup.exe

Let me know what I can do to get debug logs to you or something? I'm also on
IRC if that's easier. (harkx)


Regards,



Kristof.



I observed the following:

If I configure PyHoca-GUI to use my password-protected key file
(header below), I get the error:
not a valid EC private key file!

If I configure PyHoca-GUI to Discover SSH keys or use SSH agent for
X2GO authentication, and then launch Pageant and load my
PuTTY-formatted private key into Pageant, I get the error you got:
An unknown error occurred during authentication

Did you do the latter?

Note that I can connect to this server using password authentication.


-Mike#2


if you launch pyhoca-gui with --libdebug from a terminal (msys Git  
terminal, or cygwin shell), then pyhoca-gui will throw the unknown  
exception on the command line.


It may well be, that the issue is solved in python-x2go 0.5.0.3. But not sure.

Please report back what exact exception is thrown. Can I test  
pyhoca-gui on the WinBuilder machine?


Mike

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Re: [X2Go-User] Testers Wanted: PyHoca-GUI for Windows 0.5.0.3-20150124

[Mike Gabriel]

Hi Michael,

On  So 25 Jan 2015 14:12:07 CET, Michael DePaulo wrote:


On Sun, Jan 25, 2015 at 3:31 AM, Kristof Hardy
kristof.ha...@catsanddogs.com wrote:



Hi Mike,

thanks for the new release. I just updated and looks like I can't connect
anymore.

I get an error on launching my Mate desktop: An unknown error occured during
authentication!
(I'm using pubiuc key authentication and I'm on Win8.1)

It worked fine with the previous version I used:
http://code.x2go.org/releases/binary-win32/pyhoca-gui/previews/0.5.0.0/PyHoca-GUI_0.5.0.0-pre02_win32-setup.exe

Let me know what I can do to get debug logs to you or something? I'm also on
IRC if that's easier. (harkx)


Regards,



Kristof.



I observed the following:

If I configure PyHoca-GUI to use my password-protected key file
(header below), I get the error:
not a valid EC private key file!

If I configure PyHoca-GUI to Discover SSH keys or use SSH agent for
X2GO authentication, and then launch Pageant and load my
PuTTY-formatted private key into Pageant, I get the error you got:
An unknown error occurred during authentication

Did you do the latter?

Note that I can connect to this server using password authentication.


-Mike#2


if you launch pyhoca-gui with --libdebug from a terminal (msys Git  
terminal, or cygwin shell), then pyhoca-gui will throw the unknown  
exception on the command line.


It may well be, that the issue is solved in python-x2go 0.5.0.3. But not sure.

Please report back what exact exception is thrown. Can I test  
pyhoca-gui on the WinBuilder machine?


Mike

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Re: [X2Go-User] x2gomountdirs only after 2 minutes

[Mike Gabriel]

Hi Kristof,

On  Do 15 Jan 2015 16:20:21 CET, Kristof Hardy wrote:


Hi all,

On some computers I login with a user and in the syslog I get:

Jan 15 16:06:57 lin-cad-dev-ubuntu /usr/bin/x2gomountdirs[11380]: WARNING:
mounting of /cygdrive/C/Users//X2GO~1/S-1A99~1/spool failed

As a result, not only is the session slower with logging in but also the
logout can take 20-30 seconds.

In the file:
/tmp/.x2go-/C--51-1421334287_stDMATE_dp32/sshfs-mounts.log (END)
I see:
read: Connection reset by peer

At first I was thinking the mount is not working but it does mount, after 2
minutes:
Jan 15 16:14:25 lin-cad-dev-ubuntu /usr/bin/x2gomountdirs[14553]: WARNING:
mounting of /cygdrive/C/Users/Geert/X2GO~1/S-102D~1/spool failed

Logging in on a different computer with the same user = no problem. (both
x2go clients are v4.0.3.1 on windows 8.1)

Is this anything I can (easily) resolve?


Regards,
Kristof.


the reason for this delay is a failing sshfs operation in  
x2gomountdirs. I discovered that, as well, a week back or so [1].


I introduced and enforced timeout on sshfs mounting of 30s (maybe this  
should be even shorter?).


This issue will be solved/worked-around in x2goserver 4.0.1.19.

Mike

[1]  
http://code.x2go.org/gitweb?p=x2goserver.git;a=commitdiff;h=fdf4ca1949d2e8e52dfe34ffd8e4ee565980c0a8


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