The only known explanation I can think of for this is bug 1897765, which a few gamers have reported (including upstream) as breaking fullscreen support. So please try following these instructions and tell us if you find any evidence of 'gnome-shell' crashing:
https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment Maybe you won't find evidence but it's definitely a simple explanation we should check for. ** Tags removed: regression-proposed ** Tags added: regression-update -- 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/1905637 Title: Games don't go full screen correctly with newer version of libmutter Status in mutter package in Ubuntu: Confirmed Bug description: Some games (I tried using Portal and Tomb Raider 2013, both native games) don't go full screen correctly (even configured for it). I tracked down the problem to a regression on package libmutter-7-0. The problem occurs with latest version, 3.38.1-2ubuntu1, but when I downgrade the package (and also the package gir1.2-mutter-7) to 3.38.1-1ubuntu1 the gomes went full screen normally. I'm using Ubuntu 20.10. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu50.2 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.10 InstallationDate: Installed on 2020-10-23 (33 days ago) InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022) NonfreeKernelModules: nvidia_modeset nvidia Package: libmutter-7-0 3.38.1-1ubuntu1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.8.0-30.32-generic 5.8.17 Tags: groovy third-party-packages Uname: Linux 5.8.0-30-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1905637/+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
