Bug 478924

Summary: HDMI TV 144hz broken on Wayland, works fine on X11
Product: [Plasma] kwin Reporter: kodatarule
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: major CC: kde
Priority: NOR    
Version First Reported In: 5.27.10   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description kodatarule 2023-12-23 10:01:11 UTC 
SUMMARY
Plugging in TV through HDMI and setting 4K@144hz makes the screen have snowfalls like old CRT with unusable desktop at all, this happens on both AMD with Mesa and Nvidia with their proprietary 545.29.06

STEPS TO REPRODUCE
1. plugin a TV which supports 4K@144hz - set it to that and not 120hz, the display would be garbled with snowfall like screen like old CRT without it being usable
Operating System: EndeavourOS 
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.113.0
Qt Version: 5.15.11
Kernel Version: 6.6.8-x64v3-xanmod1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800X3D 8-Core Processor
Memory: 31,3 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3090/PCIe/SSE2

The AMD system on which I tested has the same OS, just specs are different AMD APU(with Nvidia rtx 3060, but the AMD APU renders the desktop and everything) with a Ryzen 7 6800H, both observed same result.
Comment 1 David Edmundson 2024-01-04 16:38:39 UTC 
Can you run "drminfo" (it's in AUR) when in this state? 

Ideally could you also run weston / sway and report if they work, with their drm_info too.
Comment 2 Bug Janitor Service 2024-01-19 03:45:37 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 3 Bug Janitor Service 2024-02-03 03:45:23 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!