Hello Timo, or anyone else affected,

Accepted mutter into noble-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/mutter/46.2-1ubuntu0.24.04.6 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-
noble to verification-done-noble. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-noble. 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 Noble)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-noble

-- 
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/2090824

Title:
  mutter crashes on Ubuntu 24.04 while playing Among Us with
  meta_wayland_pointer_constraint_deactivate

Status in Mutter:
  Fix Released
Status in mutter package in Ubuntu:
  Fix Released
Status in mutter source package in Noble:
  Fix Committed

Bug description:
  [ Impact ]

  Touch input will crash the desktop session when an application has
  requested pointer constraints or pointer lock.

  gnome-shell reports: libmutter:ERROR:../src/wayland/meta-wayland-
  pointer-constraints.c:565:meta_wayland_pointer_constraint_deactivate:
  code should not be reached

  This is fixed upstream in
  https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3889

  [ Test Plan ]

  0. Set-up a touchscreen machine with Ubuntu Desktop 24.04 LTS
  0. Install the update from noble-proposed, and reboot
  1. Download the attachment "bug-2090824.html"
  2. Open "bug-2090824.html" in firefox.
  3. Follow the instructions on the webpage, that is:
  3.1. Click anywhere in the page with the mouse or touchpad
  3.2. Using the touchscreen, drag the finger around the page
  3.3. Move the cursor with the mouse or touchpad
  4. Verify that the desktop did not crash, and that you were not logged-out.

  [ Where problems could occur ]

  mutter is the Wayland compositor library that provides graphics and inputs 
for the GNOME desktop, thus is a critical component.
  Problems could manifest with mouse/touch input not working anymore, or sudden 
log-out if gnome-shell crashes.

  [ Original bug report ]

  Laptop is Dell XPS 13 (9370), with i7-8550U CPU with internal
  graphics, and with touchscreen.

  Quite commonly the whole session crashes with error log looking like:

  gnome-shell[2473]: #0   647e91fc7678 i   
resource:///org/gnome/shell/ui/init.js:21 (2afcdb070bf0 @ 48)
  gnome-shell[2473]: == Stack trace for context 0x647e91f03d20 ==
  gnome-shell[2473]: GNOME Shell crashed with signal 6
  gnome-shell[2473]: Bail out! 
libmutter:ERROR:../src/wayland/meta-wayland-pointer-constraints.c:565:meta_wayland_pointer_constraint_deactivate:
 code should not be reached
  gnome-shell[2473]: 
libmutter:ERROR:../src/wayland/meta-wayland-pointer-constraints.c:565:meta_wayland_pointer_constraint_deactivate:
 code should not be reached
  gnome-shell[2473]: **

  and takes the whole desktop session with it.

  This is possibly upstream
  https://gitlab.gnome.org/GNOME/mutter/-/issues/3487 issue.

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