Hello Daniel, or anyone else affected,

Accepted mutter into jammy-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/mutter/42.9-0ubuntu7
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-
jammy to verification-done-jammy. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-jammy. 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.

** Tags removed: verification-failed-jammy
** Tags added: verification-needed-jammy

-- 
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/2054510

Title:
  Incomplete screen redraws in virtual machines running Xorg

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

Bug description:
  [ Impact ]

  When using software rendering on Xorg (so usually just in VMs), some
  parts of app windows may fail to redraw.

  https://gitlab.gnome.org/GNOME/mutter/-/issues/2880

  [ Test Plan ]

  1. Set up a virtual machine without graphics acceleration.
  2. Log into 'Ubuntu on Xorg'.
  3. Open Settings > About and verify Graphics = llvmpipe (or "Software 
Rendering"), and Windowing System = X11.
  4. sudo snap install chromium
  5. Open Chromium and find a web page with lots of text. Plain text without 
any links and staying at the top of the page will work best because you don't 
want to trigger any scrolling.
  6. Start selecting text with the mouse and while holding the button move the 
mouse up and down rapidly. Avoid triggering any page scrolling.
  7. Release the mouse button in roughly the middle of the area of text that 
was selected.
  8. Verify the remaining text selection is contiguous and not broken into 
multiple disconnected text selections (the bug).
  9. Repeat steps 7 and 8 several times to be sure.

  [ Where problems could occur ]

  The fix adds a new synchronization point between the compositor and X
  server. This should be inconsequential, although there is a "sync
  ring" in mutter used for this, and if a mistake occurs there then
  other parts of the desktop could appear to stop responding in Xorg
  sessions.

  [ Other Info ]

  This is a regression that started in 3.37.3 due to
  https://gitlab.gnome.org/GNOME/mutter/-/commit/551101c65cda.

To manage notifications about this bug go to:
https://bugs.launchpad.net/mutter/+bug/2054510/+subscriptions


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