This bug was fixed in the package mutter - 46.2-1ubuntu0.24.04.2
---------------
mutter (46.2-1ubuntu0.24.04.2) noble; urgency=medium
[ Marco Trevisan (Treviño) ]
* debian/patches: Fix screen recording crash with scaling and a custom cursor
(LP: #2077746)
[ Daniel van Vugt ]
* Add backends-native-Avoid-duplicating-or-losing-KMS-property-.patch
to avoid duplicating or losing colour profile, night light, HDR, or
privacy screen updates (LP: #2025006)
* Update the KMS deadline evasion patch to 2000us instead of 1000us.
Some laptops need higher numbers than 1000us to avoid cursor stutter
(LP: #2076318)
-- Marco Trevisan (Treviño) <ma...@ubuntu.com> Wed, 28 Aug 2024
15:55:48 +0200
** Changed in: mutter (Ubuntu Noble)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2025006
Title:
Monitor colour profile is randomly not applied
Status in mutter package in Ubuntu:
Fix Released
Status in mutter source package in Noble:
Fix Released
Status in mutter source package in Oracular:
Fix Released
Bug description:
[ Impact ]
Colour profiles fail to apply at random times in Wayland sessions.
Either when enabled in Settings>Color, or when logging into a new
session.
[ Workaround ]
Switch VTs away and back to your login, usually with Ctrl+Alt+F3,
Ctrl+Alt+F2. The correct colour profile is now more likely to be
applied.
[ Test Plan ]
1. Log into a Wayland session.
2. Open Settings > Color.
3. Select your primary monitor and 'Add profile'.
4. Add a whole-screen profile that will visibly change the screen like 'D50'.
5. Verify the new profile does not have the ⓘ icon next to it.
6. Repeatedly swap between enabling the new file, and enabling the old
automatic profile.
7. Verify the screen colour temperature changes EVERY TIME that the ✓ check
mark moves.
[ Where problems could occur ]
KMS property management in Wayland sessions has been redesigned for
this fix, which includes colour management, night light, and hardware
privacy screens. So there is a risk of unexpected behaviour in any of
those features.
Since KMS properties are applied atomically on most machines, this
could also affect screen refresh performance.
[ Other Info ]
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2025006/+subscriptions
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