This bug was fixed in the package gnome-control-center - 1:44.3-1ubuntu2
---------------
gnome-control-center (1:44.3-1ubuntu2) mantic; urgency=medium
* Add patch to fix mirror mode crash when resolution of
the 2 monitors don't match (LP: #2026228)
-- Dirk Su <[email protected]> Wed, 12 Jul 2023 13:29:55 -0400
** Changed in: gnome-control-center (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2026228
Title:
gnome-control-center crashed when switching to mirror mode and
monitors don't have matched resolution
Status in OEM Priority Project:
Confirmed
Status in gnome-control-center package in Ubuntu:
Fix Released
Status in gnome-control-center source package in Jammy:
New
Status in gnome-control-center source package in Kinetic:
Won't Fix
Status in gnome-control-center source package in Lunar:
Incomplete
Bug description:
[Impact]
gnome-control-center crashed when switching to mirror mode and monitors don't
have matched resolution
[Test case]
Mirror mode is only an option if there are only 2 monitors connected even if
one monitor is disabled. A laptop's internal screen counts as one of the
monitors.
1. Connected monitors to system which don't have same resolution.
2. Open the GNOME Settings app (gnome-control-center)
3. On the left sidebar, click Displays to switch to the Display panel
4. Switch to mirror mode
3. gnome-control-center won't crash
[Where problems could occur]
It only modified the code related to mirror mode in Displays panel. For KK
and LL check variable (best_mode) before using it. For Jammy, modified the way
to find cloning mode and check the variable (best_mode) . The second patch
already included in gnome-42. The risk will be low.
[Other info]
Two Merge Request are related
1. Check best_mode exist before adding flag
(https://gitlab.gnome.org/GNOME/gnome-control-center/-/merge_requests/1835)
2. Use virtual clone modes when mirroring
(https://gitlab.gnome.org/GNOME/gnome-control-center/-/merge_requests/1376)
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