https://bugs.kde.org/show_bug.cgi?id=470427
Bug ID: 470427
Summary: "kwin_wayland" overloading CPU getting unusable
desktop
Classification: Plasma
Product: kwin
Version: 5.27.5
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: grave
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: rafael.linux.u...@gmail.com
Target Milestone: ---
Created attachment 159328
--> https://bugs.kde.org/attachment.cgi?id=159328&action=edit
perf.data view
SUMMARY
Enabling Wayland session in Plasma I got an unusable desktop. 1 CPU core is
used at 100%). All is so slow that moving mouse takes 3 to 4 seconds each time,
jumping from one place to next, like if FPS dropped all over desktop.
"kwin_wayland" is the process eating CPU. These are the sub-threads involved (I
got from perf.data):
- kms_swrast_dri.so (repeated x 5 times) at 99.3% CPU
- libc.so.6 (repeated x 2 times) at 99.3% CPU
STEPS TO REPRODUCE
1. Select Wayland before authenticate user
2. Authenticate user
3. Desktop works like 1/10 of normal speed
OBSERVED RESULT
If I switch to Ctrl+Alt+F1 and come back to desktop, I only have mouse pointer
over a black desktop. No way to click nothing, cause there is nothing to click
in, only a black background and my mouse pointer.
EXPECTED RESULT
To work like with X Org Session
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20230527
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
Kernel Version: 6.3.2-1-default (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-6600K CPU @ 3.50GHz
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1050 Ti/PCIe/SSE2
ADDITIONAL INFORMATION
Nvidia original repository drivers installed. No issues at all in X Window
session.
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