Public bug reported:

[ Impact ]

If selecting another integer scaling after disabling fractional scaling

[ Test case ]

When running Ubuntu session under X11, in gnome-control-center, display panel:
 - Ensure 100% scaling is selected and applied
 - Enable fractional scaling
 - Select 200% scaling (or bigger integer scaling)
   - Green "Apply" button should be visible and clickable
 - Deactivate fractional scaling
   - Green "Apply" button stays and fractional scaling isn't disabled until 
applied

Repeat with inverted scaling orders (applying 200% and then selecting
100%)

Currently, once another integer value is selected, we just deselect the
user choice and restore the previous one, deactivating the fractional
scaling promtply.

[ Regression potential ]

- Displays are wrongly disposed and configured when fractional scaling is 
enabled
- Configurations are not applicable.

** Affects: gnome-control-center (Ubuntu)
     Importance: Low
     Assignee: Marco Trevisan (Treviño) (3v1n0)
         Status: In Progress


** Tags: xrandr-scaling

** Description changed:

  [ Impact ]
  
  If selecting another integer scaling after disabling fractional scaling
  
  [ Test case ]
  
  When running Ubuntu session under X11, in gnome-control-center, display panel:
-  - Ensure 100% scaling is selected and applied
-  - Enable fractional scaling
-  - Select 200% scaling (or bigger integer scaling)
-    - Green "Apply" button should be visible and clickable
-  - Deactivate fractional scaling
-    - Green "Apply" button stays and fractional scaling isn't disabled until 
applied
+  - Ensure 100% scaling is selected and applied
+  - Enable fractional scaling
+  - Select 200% scaling (or bigger integer scaling)
+    - Green "Apply" button should be visible and clickable
+  - Deactivate fractional scaling
+    - Green "Apply" button stays and fractional scaling isn't disabled until 
applied
  
  Repeat with inverted scaling orders (applying 200% and then selecting
  100%)
  
  Currently, once another integer value is selected, we just deselect the
  user choice and restore the previous one, deactivating the fractional
  scaling promtply.
+ 
+ [ Regression potential ]
+ 
+ - Displays are wrongly disposed and configured when fractional scaling is 
enabled
+ - Configurations are not applicable.

-- 
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Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu.
https://bugs.launchpad.net/bugs/1887707

Title:
  Disabling fractional scaling after selecting another integer scaling
  may unselect user choice

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