Hello Cristiano, or anyone else affected,

Accepted mutter into focal-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/mutter/3.36.6-1ubuntu0.20.04.2 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-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. 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 Focal)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-focal

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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/1896818

Title:
  Gnome-shell crash after turn display off in mutter
  3.36.6-ubuntu0.20.04.1 (NVIDIA)

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

Bug description:
  In Ubuntu 20.04.1 [focal-proposed]:

  [ Impact ]
  GNOME Shell crash after updating mutter to version 3.36.6-ubuntu0.20.04.1.
  With the old version (3.36.4-0ubuntu0.20.04.1) and (3.36.4-0ubuntu0.20.04.2), 
all works fine.

  [ Test case ]
  Steps to reproduce the error:
  1) Lock screen;
  2) Turn off the display;
  3) Turn on the display;

  And the Gnome Shell crash and show us a blank screen with the message:
  "Oh no! Something has gone wrong."

  [ Regression potential ]
  This very fix was already handled as part of bug #1889090 and we had no 
regression report,.

  However, one possible is that the screen size is not set properly for
  the session, or that panning is enabled.

  [ Workaround ]
  Downgrade the libmutter package temporarily.

  ProblemType: BugDistroRelease: Ubuntu 20.04
  Package: mutter 3.36.6-1ubuntu0.20.04.1
  ProcVersionSignature: Ubuntu 5.4.0-49.53-generic 5.4.65
  Uname: Linux 5.4.0-49-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.9
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Sep 23 15:57:17 2020
  InstallationDate: Installed on 2020-08-15 (38 days ago)
  InstallationMedia: Ubuntu 20.04.1 2020.08.15 LTS "Custom Focal Fossa" 
(20200815)SourcePackage: mutter
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.default.apport:
   # set this to 0 to disable apport, or to 1 to enable it
   # you can temporarily override this with
   # sudo service apport start force_start=1
   enabled=0
  mtime.conffile..etc.default.apport: 2020-08-15T17:44:36

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