Display within switchboard crashes with sementation fault

[Daniel Witte]

Hi,

I have 2 Display. If i deactivate 1 i cant active the second one because the Displayapp crashes. I had to enable the monitor with xrandr over the terminal, than i can configure the two Displays.

The segmentation fault comes in the syslog.

[Mirko (mrk-ferranti)]

Hi all, i've the same problem.
I user xrandr to switch monitor.
There is a better solution to solve this problem? Because everytime i boot up, os select by default the wrong monitor, and it is uncomfortable.

[Sativa (patrik-mueller96)]

Hello,

i've had the same error. Installing & Setting up Elementary OS with two Monitors was no Problem.
But when i removed one to use it for another PC and plug it back in it happend.
The Display Application crashes as soon as i "checkbox" the second Monitor for use.

I also fixed it with arandr (xrandr + GUI),
but i had to set the Monitors to mirrored first to set it at the Displays App to segmentation.

[JaccoH (jacco)]

For me launching the display plug crashes switchboard as well. Kind of annoying:

jhoeve-a@laptop-jacco:~$ switchboard --display=:0 display

** (switchboard:8144): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-k3wNWXxF7v: Connection refused
[INFO 15:00:42.784368] Application.vala:155: System Settings version: 2.0
[INFO 15:00:42.784574] Application.vala:157: Kernel version: 4.2.0-040200-generic
[INFO 15:00:42.882810] Tweaks.vala:229: Activating Tweak plug
switchboard: symbol lookup error: /usr/lib/x86_64-linux-gnu/switchboard/hardware/pantheon-display/libpantheon-display.so: undefined symbol: gnome_rr_output_info_supports_rotation

[JaccoH (jacco)]

It is not tweak plug bug. I have the same issue, without tweaks:

jhoeve-a@laptop-jacco:~/GitCollections/authdns-ansible-code$ switchboard --display=:0 display

** (switchboard:14874): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-OFD4pWGdWq: Connection refused
[INFO 14:38:31.672099] Application.vala:155: System Settings version: 2.0
[INFO 14:38:31.672176] Application.vala:157: Kernel version: 4.2.0-040200-generic
switchboard: symbol lookup error: /usr/lib/x86_64-linux-gnu/switchboard/hardware/pantheon-display/libpantheon-display.so: undefined symbol: gnome_rr_output_info_supports_rotation

[JaccoH (jacco)]

Also see: https://bugs.launchpad.net/elementaryos/+bug/1590193

[JaccoH (jacco)]

Found the cause... sorry.

Somehow I was using daily instead of global on Freya. I never intentionally set that though.