apport information ** Attachment added: "ProcCpuinfoMinimal.txt" https://bugs.launchpad.net/bugs/1861391/+attachment/5324376/+files/ProcCpuinfoMinimal.txt
-- 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/1861391 Title: Full-screen window flickers once when switching to it Status in mutter package in Ubuntu: Incomplete Bug description: When using *some* applications (I observed it with Emacs and gnome- terminal) in full-screen mode, they flicker once shortly after switching to them with e.g. Alt-Tab. To reproduce it: 1. Open Emacs in full-screen mode and one other application (e.g. Chromium). 2. Switch to the other app with Alt-Tab. 3. Switch back to Emacs. Then I observe: 1. Emacs becomes visible. 2. After a fraction of a second, the Emacs windows is transparent for a very very short time (flicker). 3. Then, the windows is stable and usable. Usually, I do not observe this behaviour right from the start. I have to work with the computer for a couple of minutes to see it. I have been unable to find out whether a certain action triggers the problem. However, when it occurs, it does not go away again until the next restart of the X server. This is regression that I observe since Ubuntu 19.10. Changes of the graphics driver does not change anything, however, switching to Wayland solves the problem. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 19.10 InstallationDate: Installed on 2019-11-16 (75 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) Package: mutter 3.34.1+git20191107-1ubuntu1~19.10.1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13 Tags: eoan Uname: Linux 5.3.0-29-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker lpadmin lxd plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1861391/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
