https://bugs.kde.org/show_bug.cgi?id=456304
Bug ID: 456304
Summary: kwin_wayland takes up 100% CPU after switching to
another user
Product: kwin
Version: 5.25.2
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: k...@hexchain.org
Target Milestone: ---
Created attachment 150379
--> https://bugs.kde.org/attachment.cgi?id=150379&action=edit
perf record -g -p PID / perf report --stdio
SUMMARY
The kwin_wayland process takes 100% CPU (1 core) after switching to another
user.
I've attached a perf report of the kwin_wayland process.
STEPS TO REPRODUCE
1. Start a Plasma (Wayland) session
2. Select "Switch User" in the kickoff menu, and switch to another user
OBSERVED RESULT
Most of the time, the kwin_wayland process of the previous session uses 100%
CPU.
EXPECTED RESULT
The kwin_wayland process of the inactive session should not use any significant
amount of CPU time.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.25.2
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.5
Kernel Version: 5.18.8-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 4800H with Radeon Graphics
Memory: 28.8 GiB of RAM
Graphics Processor: AMD RENOIR
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