Bug 491005 - Massive stuttering when GPU is almost 100% load after updating to linux 6.10
Summary: Massive stuttering when GPU is almost 100% load after updating to linux 6.10
Status: RESOLVED UPSTREAM
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (show other bugs)
Version: 6.1.3
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-07-30 01:17 UTC by username
Modified: 2024-07-30 09:21 UTC (History)
1 user (show)

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Description username 2024-07-30 01:17:52 UTC 
***
After updating linux to 6.10 I observer massive stuttering when GPU is almost 100% load
There is no issue in linux 6.9.9
There is no issue in KDE X11 session
There is no issue in Gnome Mutter Wayland

Downdrading KWin to 6.1.2/6.1.1/6.1.0 does not help
***

I uploaded 2 videos to better see the issue: one from linux 6.10 (stuttering) - https://www.youtube.com/watch?v=Es8pQ1GKjPo
Another from linux 6.9.9 (smooth fps) - https://www.youtube.com/watch?v=Uh413bco3HA

STEPS TO REPRODUCE
1. Update linux to 6.10 or newer
2. Launch some GPU-heavy game
3. Make sure GPU is about 97-100% load

OBSERVED RESULT
Stuttering

EXPECTED RESULT
Smooth fps

SOFTWARE/OS VERSIONS
Linux: 6.10.2.arch1
KDE Plasma Version: 6.1.3
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.2
GPU: AMD Radeon RX 6900 XT (AMDGPU, RADV)
Comment 1 Zamundaaa 2024-07-30 09:21:45 UTC 
If the only difference is the kernel version, then this is a kernel regression. Please report it to https://gitlab.freedesktop.org/drm/amd/-/issues