https://bugs.kde.org/show_bug.cgi?id=480797
Bug ID: 480797
Summary: Gamescope has very poor performance if Steam is
launched via KRunner/Apps menu, runs normally when
launched via Konsole
Classification: I don't know
Product: kde
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: unassigned-b...@kde.org
Reporter: burne...@gmail.com
Target Milestone: ---
SUMMARY
***
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***
Launching Steam via the Plasma Applications menu ("start menu") or via KRunner
and then running a game (tested games: Dark Souls 3, Elden Ring, Baldur's Gate
3) using Gamescope causes the game to run with substantially reduced
performance compared to without Gamescope. Closing Steam and then restarting it
by typing `steam` into Konsole resolves the issue with Gamescope.
Related issue on the Gamescope bugtracker:
https://github.com/ValveSoftware/gamescope/issues/1115
STEPS TO REPRODUCE
1. Launch Steam using KRunner or from the Application Launcher
2. Set launch options similar to this for a game: gamescope -e -w 2560 -h 1440
-W 2560 -H 1440 -f -r 144 -- mangohud %command%
3. The game will run poorly
4. Close Steam, then open Konsole and re-launch Steam from the command line and
start the game again. It will run normally.
OBSERVED RESULT
Gamescope has a large performance impact
EXPECTED RESULT
Gamescope next to no performance impact
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 39, kernel 6.6.13-200, Wayland session (bug also
happens in X11 session)
(available in About System)
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.113.0
Qt Version: 5.15.12
ADDITIONAL INFORMATION
GPU: AMD Radeon 6700XT, Mesa 23.3.3
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