This bug was fixed in the package mutter - 46.2-1ubuntu0.24.04.1

---------------
mutter (46.2-1ubuntu0.24.04.1) noble; urgency=medium

  [ Daniel van Vugt ]
  * New upstream release 46.2 (LP: #2068598)
    - Fixed mouse clicks falling through to the window behind (LP: #2026194)
    - Fixed a crash in meta_wayland_transaction_commit (LP: #2061739)
    - Fixed night light getting stuck on (LP: #2066902)
  * New upstream release 46.1 (LP: #2064735):
    - Fixed blank screen on hybrid GPU machines using nouveau (LP: #2066931)
    - Fixed a monitor hotplug crash (LP: #2050865)
    - Improved performance on secondary GPU monitors (LP: #2038801)
  * Refreshed patches:
    - Support-Dynamic-triple-double-buffering.patch (LP: #2070437, LP: #2070438)
    - meson-Do-not-mark-CI-test-tools-as-required.patch
    - Mark-several-additional-tests-as-flaky.patch
  * Add clutter/conform gesture tests to the list of known flaky ones:
    it's a new test in Mutter 46 and not yet reliable.
  * Add build-Compile-schemas-locally-for-use-in-build-tests.patch to compile
    gsettings schemas for use in build tests. Debian CI requires this now and
    it makes rebuilds more resilient against infrastructure changes.
  * Add wayland-Disable-linux-drm-syncobj-v1.patch to avoid enabling major
    new features in Noble updates, as detailed in:
    https://lists.ubuntu.com/archives/ubuntu-release/2024-May/006087.html
  * Add backends-Handle-null-views-instead-of-creating-dummy-view.patch
    to prevent "clutter_frame_clock_notify_presented: code should not be
    reached" log spam in some Nvidia Wayland sessions (LP: #1967707)
  * Add backends-Restore-support-for-X11-cursor-themes.patch to restore
    support for X11 cursor themes, which was lost in Mutter 46.0
    (LP: #2062377, LP: #2063869)

  [ Jeremy BĂ­cha ]
  * Stop compiling gsettings schemas in debian/rules
  * Opt into Salsa CI
  * Drop packaging references to Hurd since this is Linux-only
  * Update libmutter-14-0.symbols
  * Update Breaks
  * Refreshed patches:
    - window-Add-ability-to-override-the-edge-constraints.patch
    - x11-Add-support-for-fractional-scaling-using-Randr.patch
  * Drop upstreamed patches:
    - Nvidia-secondary-GPU-copy-acceleration.patch
    - compositor-sync-ring-Allow-the-gpu_fence-to-be-moved.patch

  [ Marco Trevisan ]
  * Add place-Always-center-initial-setup.patch (LP: #2016013)

 -- Daniel van Vugt <[email protected]>  Fri, 28 Jun 2024
17:35:12 +0800

** Changed in: mutter (Ubuntu Noble)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/2066902

Title:
  Night Light occasionally gets stuck

Status in Mutter:
  New
Status in mutter package in Ubuntu:
  Triaged
Status in mutter source package in Noble:
  Triaged
Status in mutter source package in Oracular:
  Triaged

Bug description:
  [ Impact ]

  Since installing Ubuntu 24.04, every now and then Night Light gets
  stuck when my screen is locked at night and I unlock it in the
  morning. The screen is then very orange (more so than normally is the
  case with Night Light), and disabling it with the button in in the top
  bar menu does nothing.

  The only ways to restore the screen to normal are disabling and
  enabling the colour profile or running `gdbus call -e -o
  /org/gnome/SettingsDaemon/Color -d org.gnome.SettingsDaemon.Color -m
  org.gnome.SettingsDaemon.Color.NightLightPreview 1`

  [ Test Plan ]

  Unknown. Requires OP verification.

  [ Where problems could occur ]

  Night light and colour profiles are one in the same feature so
  touching one always risks affecting the other. Since all such gamma
  changes get committed along with other screen updates, there is the
  risk (particularly with atomic mode setting) that a mistake in any one
  change will cause the entire screen update to fail, resulting in black
  frames.

  [ Other Info ]

  I have never been able to find anything remotely relevant in any
  system logs regarding this issue. It also does not happen every day,
  but probably once every seven to ten days or so.

  My PC has an AMD RX550 GPU using the amdgpu driver. I'm not sure if it
  makes a difference, but so far I've not seen this problem on my other
  machines with Intel IGPs.

  The upstream bug report can be found here:
  https://gitlab.gnome.org/GNOME/mutter/-/issues/3439

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