https://bugs.kde.org/show_bug.cgi?id=459405
Bug ID: 459405
Summary: "kwin_core: Got invalid presentation timestamp" spams
logs if switched to display on external screen only,
Nvidia Optimus
Classification: Unclassified
Product: kwin
Version: 5.25.5
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: core
Assignee: kwin-bugs-n...@kde.org
Reporter: pepk...@gmail.com
Target Milestone: ---
Created attachment 152230
--> https://bugs.kde.org/attachment.cgi?id=152230&action=edit
Logs from kwin_x11 --replace when issue appeared
SUMMARY
kwin_core spams logs with around 2000 messages per minute with:
kwin_core: Got invalid presentation timestamp: 0 (current "redacted number")
Spam only happens when only external display is being driven.
STEPS TO REPRODUCE
1. Switch to render on external display only.
2. do kwin_x11 --replace.
3. Log spam starts.
3. Switch either to "internal only", "extend(left or ritght)".
4. Spam stops
5. If switched to external only, spam resumes.
OBSERVED RESULT
Spam in logs, yesterday I counted around 2k lines per minute.
EXPECTED RESULT
No journalctl tripping logrotate quite often
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
Kernel Version: 5.19.9-zen1-1-zen (64-bit)
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 4800H with Radeon Graphics
Memory: 15.0 GiB of RAM
Graphics Processor: AMD RENOIR
Secondary Graphics Processor: NVIDIA Corporation TU106M [GeForce RTX 2060
Mobile] (rev a1)
ADDITIONAL INFORMATION
I encountered this problem by accident, because there are some graphical
glitches happening since I connected to an external screen.
Both displays run at 144hz, internal resolution: 1920x1080, external:
2560x1440.
External screen is being driven by Nvidia, as it idles when external display is
not in use. No Optimus configuration was made, games work on Nvidia without
configuration so I didn't bother.
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