Bug 489683

Summary:	Paint Duration stuck at 120FPS weird
Product:	[Plasma] kwin	Reporter:	Pedro Paulo Monte Pagani <pedro.paulo.pagani>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	nicolas.fella, xaver.hugl
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Pedro Paulo Monte Pagani 2024-07-03 15:36:08 UTC

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SUMMARY

For some reason my Paint FPS is at 120FPS, while my Paint amount shows to be 239/240.
I can confirm that my monitor technically shows to be using 240hz meanwhile the feel is indeed 120hz. This issue is not happening on X11 only wayland, when I boot the system it starts normally with the “240hz”, but then it settles down to 119 after, if I open an appliucation my paint duration goes back to 240FPs, then it goes down after some seconds.

STEPS TO REPRODUCE

I have no idea how to actually reproduce this fully

OBSERVED RESULT
Bad FPS feels like 120hz

EXPECTED RESULT
240hz

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 6.1.1
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
Wayland (ONLY)


ADDITIONAL INFORMATION
NVIDIA GeForce RTX 3080/PCIe/SSE2

This issue does not  happen on X11 weirdly, only really wayland

Comment 1 Zamundaaa 2024-07-03 18:22:23 UTC

Is this with the 555 driver?

Comment 2 Pedro Paulo Monte Pagani 2024-07-03 18:43:08 UTC

(In reply to Zamundaaa from comment #1)
> Is this with the 555 driver?

Yes, the .02 latest

Comment 3 Zamundaaa 2024-07-10 17:54:16 UTC

Okay, it's a bug in the 555 driver. You can work around it with the kernel boot argument nvidia.NVreg_EnableGpuFirmware=0