[krdc] [Bug 369545] unable to connect to Pi running real vnc

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #14 from nutzloserwerbemu...@mailbox.org ---
(In reply to nutzloserwerbemuell from comment #13)
> I can confirm that - I get the same messages as in the post from Jose Couto
> above.
> 
> Client information:
> 
> Operating System: MX Linux 23.1 KDE x64 Libretto
> KRDC version: 22.12.3
> KDE Plasma Version: 5.27.5
> KDE Frameworks Version: 5.103.0
> Qt Version: 5.15.8
> Kernel Version: 6.1.0-10-amd64 (64-bit)
> Graphics Platform: X11
> 
> Server information:
> 
> Raspberry Pi 3 Model B Rev 1.2
> Operating System: Raspbian GNU/Linux 11 (bullseye)
> Kernel: Linux 6.1.21-v7+
> Architecture: arm

Edit: The Raspi runs RealVNC Server 7.5.1 (r50075)

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=369545

nutzloserwerbemu...@mailbox.org changed:

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--- Comment #13 from nutzloserwerbemu...@mailbox.org ---
I can confirm that - I get the same messages as in the post from Jose Couto
above.

Client information:

Operating System: MX Linux 23.1 KDE x64 Libretto
KRDC version: 22.12.3
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.0-10-amd64 (64-bit)
Graphics Platform: X11

Server information:

Raspberry Pi 3 Model B Rev 1.2
Operating System: Raspbian GNU/Linux 11 (bullseye)
Kernel: Linux 6.1.21-v7+
Architecture: arm

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Alexander Wilms]

https://bugs.kde.org/show_bug.cgi?id=369545

Alexander Wilms  changed:

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Jose Couto]

https://bugs.kde.org/show_bug.cgi?id=369545

Jose Couto  changed:

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--- Comment #12 from Jose Couto  ---
I'm seeing the same problem. It seems that KRDC is closing the connection. I
see these logs in the raspi:

ago 04 11:38:34 raspi vncserver-x11[524]: Connections: connected:
192.168.1.55::54706 (TCP)
ago 04 11:38:34 raspi vncserver-x11[524]: Connections: disconnected:
192.168.1.55::54706 (TCP) ([EndOfStream] Disconnection by client

And these messages in KRDC's console output:

QWidget::setMaximumSize: (/VncView) Negative sizes (-2147483648,-2147483648)
are not possible
QWidget::setMaximumSize: (/VncView) Negative sizes (-2147483648,-2147483648)
are not possible
QWidget::setMaximumSize: (/VncView) Negative sizes (-2147483648,-2147483648)
are not possible
QWidget::setMaximumSize: (/VncView) Negative sizes (-2147483648,-2147483648)
are not possible
KRDC: rfbInitClient failed

I'm running KRDC in a Wailand session, if it makes any difference.

Client information:

Operating System: Debian GNU/Linux (unstable)
KRDC version: 21.12.3
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.4
Kernel Version: 5.18.0-3-amd64 (64-bit)
Graphics Platform: Wayland

Server information:

Raspberry PI 4
Operating System: Debian GNU/Linux 11 (bullseye)
Kernel: Linux 5.15.53-v8+
Architecture: arm64

Thanks.

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Jose Couto]

https://bugs.kde.org/show_bug.cgi?id=369545

Jose Couto  changed:

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Andrey E.]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #11 from Andrey E.  ---
I tried several times with different formats (using "IP", "IP:1", "IP:5901"),
but I saw only blank screen.

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Andrey E.]

https://bugs.kde.org/show_bug.cgi?id=369545

Andrey E.  changed:

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--- Comment #10 from Andrey E.  ---
Created attachment 120748
  --> https://bugs.kde.org/attachment.cgi?id=120748=edit
Real VNC is working on Raspberry Pi, KRDC doesn't work

When I run KRDC using console, I also see message:
"KRDC: rfbInitClient failed"

VNC server:
Raspberry Pi 2 Model B Rev 1.1
Linux raspberrypi 4.19.42-v7+
Debian GNU/Linux
VNC(R) Server 6.4.1 (r40826) ARMv6 (Mar 13 2019 16:35:06)

VNC client:
Operating System: KDE neon 5.15
KDE Plasma Version: 5.15.5
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.3
Kernel Version: 4.15.0-51-generic
OS Type: 64-bit
KRDC 19.04.2
gir1.2-gtk-vnc-2.0:amd64 0.7.2-1
libgtk-vnc-2.0-0:amd64 0.7.2-1
libgvnc-1.0-0:amd64 0.7.2-1
libvncclient1:amd64 0.9.11+dfsg-1ubuntu1.1

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Ignat Awwit via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #9 from Ignat Awwit  ---
Urs Wolfer, thanks for you help.

Trying to connect via Remmina (openSUSE).
Pi log:
Oct 13 02:22:30 raspberrypi vncserver-x11[624]: Connections: connected:
192.168.1.35::52260
Oct 13 02:22:30 raspberrypi vncserver-x11[624]: Connections: disconnected:
192.168.1.35::52260 ([EndOfStream] Disconnection by client)

Remmina error message: "Unknown authentication scheme from VNC server: 13, 5,
6, 130"

That's right, it is a bug in LibVNC.

Anyway, KRDC does not show any messages, but simply stuck on connection stage.
It's not very good =)

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Urs Wolfer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #8 from Urs Wolfer  ---
Ignat Awwit, thanks.

It looks like a bug in the VNC library. KRDC VNC support is based on LibVNC:
http://libvnc.github.io/success.html

If you could try another client based on it to reproduce, it would be great.
You can find other clients on the bottom of the page linked above.

If you can reproduce it, please report the bug upstream and post a link here in
this bug tracker:
https://github.com/LibVNC/libvncserver

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Ignat Awwit via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #7 from Ignat Awwit  ---
Trying to connect via (Real) VNC Viewer for Windows:

Oct 11 22:57:21 raspberrypi vncserver-x11[637]: Connections: connected:
192.168.1.42::4381
Oct 11 22:57:30 raspberrypi vncserver-x11[637]: Connections: authenticated:
192.168.1.42::4381, as pi (f permissions)

Result: success!

Trying to connect via KRDC (openSUSE):

Oct 11 23:08:58 raspberrypi vncserver-x11[637]: Connections: connected:
192.168.1.35::34209
Oct 11 23:08:58 raspberrypi vncserver-x11[637]: Connections: disconnected:
192.168.1.35::34209 ([EndOfStream] Disconnection by client)

Result: failure.

All messages are taken from the /var/log/syslog on the Pi device.

https://www.realvnc.com/docs/logging.html

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Urs Wolfer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #6 from Urs Wolfer  ---
@Tom Chiverton: I don't know if this server writes any logs, but you could
check the log directory on your Pi. Log files should be easier to analyze than
packet traces.

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Tom Chiverton via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #5 from Tom Chiverton  ---
How would I get server logs ? Do you mean packet traces (e.g. wireshark) ? Or
something else ?

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Urs Wolfer via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #4 from Urs Wolfer  ---
If possible, it would probably help if you could post VNC server logs.

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[John Brown via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

John Brown  changed:

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--- Comment #3 from John Brown  ---
I have the same problem too.
Raspberry pi 3:
realvnc-vnc-server/stable 5.3.2.22164 armhf

My computer:
KRDC 4.14.18, KDE 4.14.20
Or
KRDC 16.11.70 (from git: af24d8d45ce74c299bd13bd1b881bc967f8f482f)

KRDC 16.11.70 Log:
KRDC: ## KRDC ready: 1181 ms ##
KRDC: - trying init -
KRDC: "VNC server supports protocol version -889997280.-772219232 (viewer 8.0)"
KRDC: "We have -889998176 security types to read"
KRDC: "-889998176) Received security type -772220976"
KRDC: "-889998176) Received security type -772220976"
KRDC: "-889998176) Received security type -772220976"
KRDC: "-889998176) Received security type -772220976"
KRDC: "Unknown authentication scheme from VNC server: \b"
KRDC: rfbInitClient failed
KRDC: - Starting main VNC event loop -

Final part of vnc log: sudo vncserver-x11 Log=*:stderr:100

<13> 2016-10-01T18:34:24.307Z raspberrypi Xvnc[917]: Connections: connected:
192.168.1.33::43418
<15> 2016-10-01T18:34:24.310Z raspberrypi Xvnc[917]: SConnection: reading
protocol version
<14> 2016-10-01T18:34:24.310Z raspberrypi Xvnc[917]: SConnection: Client needs
protocol version 3.8
<15> 2016-10-01T18:34:24.310Z raspberrypi Xvnc[917]: RfbConnection: Peer does
not support sync, KeepAlive disabled
<13> 2016-10-01T18:34:24.311Z raspberrypi Xvnc[917]: Connections: disconnected:
192.168.1.33::43418 ([EndOfStream] Disconnection by client)
<15> 2016-10-01T18:34:24.311Z raspberrypi Xvnc[917]: FdIo: shutdown 0xfc1cd0
(fd=28), flush true (tellHandler true)
<15> 2016-10-01T18:34:24.311Z raspberrypi Xvnc[917]: FdIo: shutdown complete
0xfc1cd0 (fd=28)
<15> 2016-10-01T18:34:24.311Z raspberrypi Xvnc[917]: FdIo: shutdown 0xfc1cd0
(fd=28), flush true (tellHandler false)

Which logs should i add to help with this problem?

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Ignat Awwit via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

Ignat Awwit  changed:

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--- Comment #2 from Ignat Awwit  ---
Same problem.

Raspberri Pi 2 Model B:
realvnc-vnc-server-5.3.2.22164

My Computer:
x86_64
openSUSE 42.1 Leap
krdc 15.12.3-17.1 (in the "about KRDC" info: 4.14.18)
libvncclient0 0.9.9-13.1
libvncserver0 0.9.9-13.1

Same console output.

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[krdc] [Bug 369545] unable to connect to Pi running real vnc

[Tom Chiverton via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=369545

--- Comment #1 from Tom Chiverton  ---
Running krdc from the command line only outputs

tp-qt 0.9.6 DEBUG: Register StreamTubeClient with name  "krdc_rfb_handler"  
tp-qt 0.9.6 DEBUG: Client registered - busName:
"org.freedesktop.Telepathy.Client.krdc_rfb_handler" objectPath:
"/org/freedesktop/Telepathy/Client/krdc_rfb_handler" interfaces:
("org.freedesktop.Telepathy.Client.Handler")  
krdc(9834)/kdeui (kdelibs): Attempt to use QAction "remote_desktop_dockwidget"
with KXMLGUIFactory! 
krdc(9834)/krdc (VNC backend): rfbInitClient failed

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