Hello Daniel, or anyone else affected,

Accepted mutter into lunar-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/mutter/44.1-0ubuntu1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
lunar to verification-done-lunar. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-lunar. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: mutter (Ubuntu Lunar)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-lunar

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to mutter in Ubuntu.
https://bugs.launchpad.net/bugs/2017097

Title:
  [raspi] GNOME Shell 44.0 runs at 30 FPS unless the CPU is being
  stressed

Status in mutter package in Ubuntu:
  Fix Released
Status in mutter source package in Lunar:
  Fix Committed

Bug description:
  [ Impact ]

  On a Raspberry Pi 400, GNOME Shell runs at 30 FPS unless the CPU is
  being stressed in which case it becomes a smooth 60 FPS. Seems like a
  frequency scaling issue.

  [ Workaround ]

  Add this to /etc/environment:

    MUTTER_DEBUG_TRIPLE_BUFFERING=always

  [ Test Plan ]

  1. Log into the default (Wayland) session on a Raspberry Pi 4/400.

  2. Set the display resolution to 1920x1080 60Hz.

  3. Drag a window around and ensure it appears smooth (60Hz).

  [ Where problems could occur ]

  Triple buffering affects all frame scheduling so any mistakes can
  cause high CPU usage, screen freezes and stutter. Try not to make
  mistakes.

  [ Original bug ]

  ProblemType: Bug
  DistroRelease: Ubuntu 23.04
  Package: mutter (not installed)
  ProcVersionSignature: Ubuntu 6.2.0-1004.5-raspi 6.2.6
  Uname: Linux 6.2.0-1004-raspi aarch64
  ApportVersion: 2.26.1-0ubuntu2
  Architecture: arm64
  CasperMD5CheckResult: unknown
  Date: Thu Apr 20 15:13:51 2023
  ImageMediaBuild: 20230417
  SourcePackage: mutter
  UpgradeStatus: No upgrade log present (probably fresh install)

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