** Description changed: Impact ====== Using Alt-Tab to leave a fullscreen game and then return breaks the game by offsetting the display by the size of the GNOME Shell top bar. Test Case ========= 1. Run a game full screen. I installed Steam and used Team Fortress 2 because it's free (but a very large download) 2. Press Alt-Tab to switch to another window and then press Alt-Tab to switch back to the game. The game should display and function normally. Regression Potential ==================== - This is fixed by cherry-picking 3 patches from the gnome-3-26 mutter branch. We are eventually expecting a mutter 3.26.2 release but I don't think there is a planned release date yet. + This is fixed in mutter 3.26.2 (LP: #1730097) These patches also fix LP: #1725821 but I was having trouble coming up with a specific test case for that issue that I could reproduce with my Intel graphics card. The upstream bug mentions that this may re-introduce tearing with full- screen videos with Firefox because Firefox disables hardware graphics acceleration on Linux. Personally, I feel that is a Firefox bug and shouldn't block this fix. (The workaround for that is to visit about:config in Firefox and set layers.acceleration.force-enabled to true and restart Firefox.) The issue of poor performance with full-screen games with GNOME 3.26 (a regression from GNOME 3.24) is a popular complaint in forums and should be fixed by these patches. - - The upstream branch - -------------------- - https://git.gnome.org/browse/mutter/log?h=gnome-3-26 Original Bug Report =================== When playing a steam game in "fullscreen" (in this case stellaris) if I alt-tab out and then back the game is no longer full screen and a portion the size of the menu bar at the top is reserved, not showing the menu just a portion of the background colour. Also after this happens all mouse clicks are offset by that same margin. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.26.1-0ubuntu4 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.7-0ubuntu3 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat Oct 21 12:16:27 2017 DisplayManager: gdm3 GsettingsChanges: b'org.gnome.shell' b'command-history' b"['ubuntu-bug']" b'org.gnome.shell' b'favorite-apps' b"['firefox.desktop', 'terminator.desktop', 'emacs25.desktop', 'quodlibet.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'gnome-control-center.desktop', 'thunderbird.desktop']" b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" InstallationDate: Installed on 2017-10-13 (7 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) SourcePackage: gnome-shell UpgradeStatus: Upgraded to artful on 2017-10-21 (0 days ago)
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1725649 Title: Fullscreen games lose "fullscreen" after an Alt+Tab To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1725649/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
