Created attachment 180101 [details] coredump from gamescope w/ backtrace SUMMARY After the latest version upgrade of KWin (6.3.3.1-2 -> 6.3.4-1) on Arch Linux, Steam games that have multiple game windows, like a launcher that appears and then closes before the game launches, will crash after the first window closes. STEPS TO REPRODUCE 1. Download Trackmania (free) from Steam 2. Add `gamescope -- %command%` to the game's launch options 3. Launch the game OBSERVED RESULT You should see the UPlay window appear for a few seconds, and then once that window disappears the game crashes instead of opening the main window. EXPECTED RESULT Gamescope should not crash under these circumstances, and did not crash until KWin 6.3.4. The crash also does not occur on Gnome. SOFTWARE/OS VERSIONS Linux/KDE Plasma: CachyOS Linux KDE Plasma Version: KDE Plasma Version: 6.3.4 KDE Frameworks Version: KDE Frameworks Version: 6.12.0 Qt Version: Qt Version: 6.8.3 (Qt Version 6.9 has the same issue) ADDITIONAL INFORMATION Report in gamescope: https://github.com/ValveSoftware/gamescope/issues/1796 I'd recommend using gamescope 3.16.2, as there is a recent regression in 3.16.3 that can present somewhat similarly to this issue.
If gamescope crashes, this is a gamescope problem
(In reply to David Edmundson from comment #1) > If gamescope crashes, this is a gamescope problem even if I cannot reproduce this issue on mutter, cosmic-comp, or KWin 6.3.3? I'm not discounting that it could be a gamescope bug, but there's only one version of one compositor where I can reproduce this so far, and it's KWin 6.3.4.
bisected to https://github.com/KDE/kwin/commit/93c9103ed3e1374d34394225ee3aa6cf8c8c955a on the KWin side with gamescope 3.16.2 at least, will flag it for the gamescope developer