Bug#769569: [gnome-control-center] Connect/Disconnect to dual monitor setup restarts GNOME

[Adnan Hodzic]

Package: gnome-control-center
Version: 1:3.14.1-1
Severity: serious

Hello,

I have a dual monitor setup, to which I connect via Dell docking station
with Dell E7440. Both monitors are connected to docking station via DVI
ports.

You also might find following useful:

ahodzic at mx-e7440:~$ lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 0b)

Regardless, when computer is connected to docking station, both displays
are outputted and everything's fine.

https://hodzic.org/img/dualmonitor.png

xrandr:

ahodzic at mx-e7440:~$ xrandr
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192
eDP1 connected (normal left inverted right x axis y axis)
   1920x1080     60.05 +  59.93
   1680x1050     59.95    59.88
   1600x1024     60.17
   1400x1050     59.98
   1280x1024     60.02
   1440x900      59.89
   1280x960      60.00
   1360x768      59.80    59.96
   1152x864      60.00
   1024x768      60.00
   800x600       60.32    56.25
   640x480       59.94
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 connected 1920x1080+1920+0 (normal left inverted right x axis y axis)
531mm x 299mm
   1920x1080     60.00*+
   1280x1024     75.02    60.02
   1152x864      75.00
   1024x768      75.08    60.00
   800x600       75.00    60.32
   640x480       75.00    60.00
   720x400       70.08
DP3 connected primary 1920x1080+0+0 (normal left inverted right x axis y
axis) 531mm x 299mm
   1920x1080     60.00*+
   1280x1024     75.02    60.02
   1152x864      75.00
   1024x768      75.08    60.00
   800x600       75.00    60.32
   640x480       75.00    60.00
   720x400       70.08
DP4 disconnected (normal left inverted right x axis y axis)
ahodzic at mx-e7440:~$

However, every time I disconnect computer from the docking station, my
gnome session will be restarted. Please be inform that during the
disconnect from docking station, it's also common for whole system to
freeze up and only option being to do a hard restart. i.e:
https://hodzic.org/img/dualmonitor_disconnect_error.jpg

If computer was on without being connected to docking station, once
connected dual monitor setup won't be detected. It will only be detected if
I restart my GNOME session or log out/log in.

https://hodzic.org/img/dualmonitor2.png

ahodzic at mx-e7440:~$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y
axis) 309mm x 173mm
   1920x1080     60.05 +  59.93*
   1680x1050     59.95    59.88
   1600x1024     60.17
   1400x1050     59.98
   1280x1024     60.02
   1440x900      59.89
   1280x960      60.00
   1360x768      59.80    59.96
   1152x864      60.00
   1024x768      60.00
   800x600       60.32    56.25
   640x480       59.94
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
ahodzic at mx-e7440:~$

Please note, this setup only works with >= 3.17 kernel, otherwise only one
screen will be detected (both screens will be mirrored). Thus, you'll only
be able to use one screen, but there are no problems during
connect/disconnect from the docking station. Meaning this problem also
might be related to the kernel itself.

Please inform me if you have any additional questions and/or comments.

Regards,

Adnan


--- System information. ---
Architecture: amd64
Kernel: Linux 3.17-1-amd64

Debian Release: jessie/sid
600 testing security.debian.org
600 testing ftp.nl.debian.org
500 trusty ppa.launchpad.net
500 testing-updates ftp.nl.debian.org
300 stable dl.google.com
200 unstable ftp.nl.debian.org
100 jessie-backports ftp.nl.debian.org
100 experimental ftp.debian.org

--- Package information. ---
Package's Depends field is empty.

Package's Recommends field is empty.

Package's Suggests field is empty.
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