Hello Ionut, or anyone else affected,

Accepted mutter into jammy-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/mutter/42.9-0ubuntu4
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-done-jammy
** Tags added: verification-needed-jammy

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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/2026887

Title:
  gnome-shell 42.9 Wayland sessions fail to start on Intel 12th gen or
  later if running 5.15/5.17 kernels (Failed to lock front buffer on
  /dev/dri/cardN: drmModeAddFB2WithModifiers failed: Invalid argument)

Status in linux package in Ubuntu:
  Fix Released
Status in linux-hwe-5.19 package in Ubuntu:
  Fix Released
Status in linux-intel-iotg package in Ubuntu:
  Confirmed
Status in linux-oem-5.17 package in Ubuntu:
  Confirmed
Status in mutter package in Ubuntu:
  Invalid
Status in linux source package in Jammy:
  Won't Fix
Status in mutter source package in Jammy:
  Fix Committed
Status in mutter source package in Kinetic:
  Invalid
Status in mutter source package in Lunar:
  Invalid
Status in mutter source package in Mantic:
  Invalid

Bug description:
  [ Impact ]

  gnome-shell/mutter 42.9 fails to start (black screen) on Intel Alder
  Lake systems running older kernels such as 5.15.

  [ Test Plan ]

  Try to log into gnome-shell. Verify there is a picture on the screen.

  [ Where problems could occur ]

  The offending code change relates to Intel-specific chip IDs so the
  change is limited to Intel systems. Although affected Intel systems
  worked perfectly before the change so we don't expect any problems in
  reverting the change. In theory the worst case is limited to more
  problems like that described in Impact above.

  [ Workarounds ]

  Add MUTTER_DEBUG_USE_KMS_MODIFIERS=0 to /etc/environment

  or upgrade to a newer kernel:
  sudo apt install linux-generic-hwe-22.04

  [ Other Info ]

  The log messages relating to this bug are:
  iul 11 19:00:11 MY-PC gnome-shell[1040]: Failed to lock front buffer on 
/dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument
  iul 11 19:00:11 MY-PC gnome-shell[1040]: Failed to lock front buffer on 
/dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument
  iul 11 19:00:11 MY-PC gnome-shell[1040]: Failed to lock front buffer on 
/dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument
  iul 11 19:00:11 MY-PC gnome-shell[1040]: Failed to lock front buffer on 
/dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument
  ...

  For kinetic: The bug never existed in mutter 43.0 (it was introduced
  in 43.2) and was already fixed in the kernel anyway.

  For lunar and later: The bug was already fixed in the kernel. You
  would only ever encounter it in theory if you downgrade the kernel.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2026887/+subscriptions


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