https://bugs.kde.org/show_bug.cgi?id=503184
Bug ID: 503184
Summary: Unjustified High CPU of kwin_wayland after logging in
Classification: Plasma
Product: kwin
Version: 6.3.4
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: skiba.a...@gmail.com
Target Milestone: ---
SUMMARY
Hey Team, after startup process kwin_wayland is having constantly quite high
CPU usage (approx 63% of single 3Ghz core), after killing it compositor(?)
restarts with kwin_wayland "idling" at CPU 0-3%
STEPS TO REPRODUCE
1. Login into Plasma
OBSERVED RESULT
With second monitor plugged in via USBC:
approx 63% of single 3Ghz core for process:
/usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8
--xwayland-fd 9 --xwayland-display :1 --xwayland-xauthority
/run/user/1000/xauth_rcGssW --xwayland
Without second montior
approx 13% of single 3Ghz core for process
/usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8
--xwayland-fd 9 --xwayland-display :1 --xwayland-xauthority
/run/user/1000/xauth_rcGssW --xwayland
but when I plugin second monitor it jumps to 63%
In both cases, killing it will make it idling (0-3%)
EXPECTED RESULT
kwin_wayland "idling" at CPU 0-3%
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.13.0
Qt Version: 6.9.0
Kernel Version: 6.13.12-x64v3-xanmod1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 4800H with Radeon Graphics
Memory: 15.0 GiB of RAM
Graphics Processor 1: AMD Radeon Graphics
Graphics Processor 2: zink Vulkan 1.3
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