Bug 478731 - Kde6 Causes strange refresh issues on 75hz
Summary: Kde6 Causes strange refresh issues on 75hz
Status: RESOLVED UPSTREAM
Alias: None
Product: kwin
Classification: Plasma
Component: platform-drm (other bugs)
Version First Reported In: master
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: qt6
Depends on:
Blocks:
 
Reported: 2023-12-19 16:09 UTC by funnyfailiers
Modified: 2023-12-19 23:34 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Vide of the bug (2.52 MB, video/mp4)
2023-12-19 16:09 UTC, funnyfailiers 		Details
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Description funnyfailiers 2023-12-19 16:09:10 UTC 
Created attachment 164295 [details]
Vide of the bug

Sorry if this is the wrong section but it seems right

STEPS TO REPRODUCE
1. Open Settings
2. Change refresh rate to 75hz

OBSERVED RESULT
Display Flickering

EXPECTED RESULT
No flickering

SOFTWARE/OS VERSIONS
Linux: 6.6.7-arch1-1
(available in About System)
KDE Plasma Version: 5.90.0
KDE Frameworks Version: 5.246.0
Qt Version: 6.6.1

ADDITIONAL INFORMATION
Cpu: 16 × AMD Ryzen 7 5800X 8-Core Processor
Ram: 15.5 GiB of RAM
Gpu: 
2b:00.0 VGA compatible controller: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] (rev a1) (prog-if 00 [VGA controller])
	Subsystem: ZOTAC International (MCO) Ltd. GP102 [GeForce GTX 1080 Ti]
Driver: nvidia propriatary
Comment 1 Zamundaaa 2023-12-19 18:37:12 UTC 
KWin doesn't do anything special when setting modes, it just uses what the kernel driver says is available, so I'm relatively confident that this is a driver bug.
It could also be a problem with the display; I've seen similar weird issues happen before with an old Intel GPU and monitor, and IIRC with DisplayLink (on Windows) too. Does it also happen on Xorg?
Comment 2 funnyfailiers 2023-12-19 19:29:45 UTC 
(In reply to Zamundaaa from comment #1)
> KWin doesn't do anything special when setting modes, it just uses what the
> kernel driver says is available, so I'm relatively confident that this is a
> driver bug.
> It could also be a problem with the display; I've seen similar weird issues
> happen before with an old Intel GPU and monitor, and IIRC with DisplayLink
> (on Windows) too. Does it also happen on Xorg?

Im using kde6 beta so im using wayland i never had this when i used xorg
Comment 3 Zamundaaa 2023-12-19 23:34:06 UTC 
Okay, then it's most likely a driver bug. Afaik the right place to report it is in the NVidia forum.