Summary: | Plasma Wayland fails to initialize Display Stream Compression | ||
---|---|---|---|
Product: | [Plasma] kwin | Reporter: | Parker Reed <parker.l.reed> |
Component: | multi-screen | Assignee: | KWin default assignee <kwin-bugs-null> |
Status: | RESOLVED UPSTREAM | ||
Severity: | normal | CC: | xaver.hugl |
Priority: | NOR | ||
Version: | 6.0.2 | ||
Target Milestone: | --- | ||
Platform: | Arch Linux | ||
OS: | Linux | ||
Latest Commit: | Version Fixed In: |
Description
Parker Reed
2024-03-25 22:49:08 UTC
Additional note: Inoperability with Wayland was present on 5.27 as well going back quite a ways. So this isn't new to Plasma 6. Just tried enabling 2 1440 75 and 1 1080 60 and got this on kernel messages [ 717.144654] amdgpu 0000:09:00.0: [drm] REG_WAIT timeout 1us * 1000 tries - dcn314_dsc_pg_control line:264 [ 717.351967] [drm] Send DSC enable to synaptics Waiting for the monitor and it's just slow enough to be past the timeout? This is a driver bug; the reason you're not seeing this with Xorg or Gnome Wayland is that they only do 8 bits per color, while KWin does 10. As a workaround you can use the KWIN_DRM_PREFER_COLOR_DEPTH=24 environment variable, which makes KWin drop down to 8bpc as well. Oh my. Thank you! Is there an existing bug triage for this I can follow? There is https://gitlab.freedesktop.org/drm/amd/-/issues/2598 already, though I'm not sure if it's the exact same issue |