** Description changed:

  [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. Switch to mirror mode through gnome-control-center
+ 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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https://bugs.launchpad.net/bugs/2026228

Title:
  gnome-control-center crashed when switching to mirror mode and
  monitors don't have matched resolution

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