Bug 478731

Summary: Kde6 Causes strange refresh issues on 75hz
Product: [Plasma] kwin Reporter: funnyfailiers
Component: platform-drmAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: normal CC: aleixpol, xaver.hugl
Priority: NOR Keywords: qt6
Version First Reported In: master   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Vide of the bug

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.