Re: Multiseat seems broken in Fedora 24

[Sergio Pascual]

2016-11-03 15:08 GMT+01:00 Ray Strode :

> Hi,
>
> > Is this use case still supported by Fedora?
> It's definitely not a tested use case.  Definitely worth filing a bug
> in upstream (gnome) bugzilla.


I filled https://bugzilla.gnome.org/show_bug.cgi?id=774144

Thanks


> I wouldn't be surprised if there's more
> than one bug that needs to get fixed before it will work again,
> though.
> It's going to get worse after
> https://bugzilla.gnome.org/show_bug.cgi?id=741688 lands since
> gnome-shell will only handle one seat, but it will get started
> per-user.
>
> --Ray
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Re: Multiseat seems broken in Fedora 24

[Kevin Fenzi]

On Thu, 03 Nov 2016 21:28:56 +0200
Jonathan Dieter  wrote:

> On Thu, 2016-11-03 at 11:24 +0100, Sergio Pascual wrote:
> > Hello,
> > 
> > I have a machine with two identical nvidia cards and I configured it
> > with multiseat and Fedora 23. It worked well, that is, two GDM login
> > screens, one in each display.
> > 
> > Then I updated to Fedora 24 and it stoped to work.  
> 
> 
> FWIW, I'm running multiseat systems on F24 using lightdm rather than
> GDM (because I want to use xscreensaver and GDM doesn't support that
> anymore).  They login to Gnome just fine.
> 
> I'm sure filing a bug report, as Ray suggested, is the best solution,
> but, if you're looking for a workaround, try using lightdm.

Do note (as I am sure Jonathan knows) that if you login to a gnome
session without gdm you will not get the normal gnome lockscreen/shield
thing and will have to use something use like xscreensaver. (The lock
option will simply not show up on the menu). 

kevin


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Re: Multiseat seems broken in Fedora 24

[Jonathan Dieter]

On Thu, 2016-11-03 at 11:24 +0100, Sergio Pascual wrote:
> Hello,
> 
> I have a machine with two identical nvidia cards and I configured it
> with multiseat and Fedora 23. It worked well, that is, two GDM login
> screens, one in each display.
> 
> Then I updated to Fedora 24 and it stoped to work.


FWIW, I'm running multiseat systems on F24 using lightdm rather than
GDM (because I want to use xscreensaver and GDM doesn't support that
anymore).  They login to Gnome just fine.

I'm sure filing a bug report, as Ray suggested, is the best solution,
but, if you're looking for a workaround, try using lightdm.

Jonathan
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Re: Multiseat seems broken in Fedora 24

[Ray Strode]

Hi,

> Is this use case still supported by Fedora?
It's definitely not a tested use case.  Definitely worth filing a bug
in upstream (gnome) bugzilla.  I wouldn't be surprised if there's more
than one bug that needs to get fixed before it will work again,
though.
It's going to get worse after
https://bugzilla.gnome.org/show_bug.cgi?id=741688 lands since
gnome-shell will only handle one seat, but it will get started
per-user.

--Ray
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Multiseat seems broken in Fedora 24

[Sergio Pascual]

Hello,

I have a machine with two identical nvidia cards and I configured it with
multiseat and Fedora 23. It worked well, that is, two GDM login screens,
one in each display.

Then I updated to Fedora 24 and it stoped to work. I have tested that
multiseat works with the LiveCDs of Fedora 23 and Fedora 24. As soon as I do

loginctl attach seat1 /sys/devices/pci:00//drm/card1

a GDM appears in the second screen. With the updated Fedora 24 I get a
black screen. journalctl says something like:

systemd-logind[1314]: New session c6 of user gdm.
systemd[1]: Started Session c6 of user gdm.
gdm-launch-environment][2804]: pam_unix(gdm-launch-environment:session):
session opened for user gdm by (uid=0)
audit[2804]: USER_START pid=2804 uid=0 auid=4294967295 ses=4294967295
subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 msg='op=PAM:session_open
grantors=pam_keyinit,pam_keyinit,pam_limits,pam_systemd,pam_unix acct="gdm"
exe="/usr/libexec/gdm-session-worker" hostname=? addr=? terminal=:6
res=success'
audit[2821]: ANOM_ABEND auid=4294967295 uid=42 gid=42 ses=4294967295
subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 pid=2821 comm="gnome-session-c"
exe="/usr/libexec/gnome-session-check-accelerated" sig=11
kernel: show_signal_msg: 3 callbacks suppressed
kernel: gnome-session-c[2821]: segfault at 71 ip 7fb4b5655c8a sp
7ffd216e9520 error 4 in libX11.so.6.3.0[7fb4b5629000+139000]

Basically, /usr/libexec/gnome-session-check-accelerated crashes

There are quite a few bugs related with gnome-session-check-accelerated
crashes in bugzilla. I can send a new one, but I'm afraid it will be lost
in the sea of bugs.

Is this use case still supported by Fedora?

Sergio
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