| Summary: | Random Flickering on Desktop | ||
|---|---|---|---|
| Product: | [Plasma] kwin | Reporter: | Wyatt Childers <kdebugs.81do7> |
| Component: | compositing | Assignee: | KWin default assignee <kwin-bugs-null> |
| Status: | RESOLVED UPSTREAM | ||
| Severity: | normal | CC: | kdedev |
| Priority: | NOR | ||
| Version First Reported In: | 6.4.5 | ||
| Target Milestone: | --- | ||
| Platform: | Fedora RPMs | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
|
Description
Wyatt Childers
2025-10-09 21:48:55 UTC
Thanks for the bug report. That does sound odd. So we can narrow things down, would it be possible to send us a screen recording when the artifacts are happening? Also, please provide the output of kscreen-doctor -o It looks like there's a driver issue stopping DisplayPort 2.1 from picking up on VRR (good to know and explains why the option wasn't present in the display settings). Looking around it looks like the kernel and AMDGPU are still a bit funky with DisplayPort 2.1.
Output: 1 DP-5 51046780-5a25-4933-9bc5-37575a80c0e6
enabled
connected
priority 1
DisplayPort
replication source:0
Modes: 1:7680x2160@120! 2:7680x2160@60 3:3840x1080@60 4:7680x2160@240* 5:3840x2160@240 6:3840x2160@120 7:3840x2160@120 8:3840x2160@60 9:3840x2160@60 10:3840x2160@30 11:3840x2160@30 12:5120x1440@240 13:5120x1440@120 14:5120x1440@60 15:3840x1080@240 16:3840x1080@120 17:2560x1440@240 18:2560x1440@120 19:2560x1440@60 20:1920x1080@240 21:1920x1080@120 22:1920x1080@120 23:1920x1080@60 24:1920x1080@60 25:1920x1080@60 26:1680x1050@60 27:1600x900@60 28:1280x1024@75 29:1280x1024@60 30:1440x900@60 31:1280x800@60 32:1152x864@75 33:1280x720@60 34:1280x720@60 35:1280x720@60 36:1024x768@75 37:1024x768@70 38:1024x768@60 39:800x600@75 40:800x600@72 41:800x600@60 42:720x480@60 43:720x480@60 44:640x480@75 45:640x480@60 46:640x480@60 47:1600x1200@60 48:1600x1200@240 49:1280x1024@240 50:1024x768@240 51:2560x1600@60 52:2560x1600@240 53:1920x1200@60 54:1920x1200@240 55:1280x800@240 56:3200x1800@60 57:3200x1800@240 58:2880x1620@60 59:2880x1620@240 60:1600x900@240 61:1368x768@60 62:1368x768@240 63:1280x720@240
Geometry: 0,0 7680x2160
Scale: 1
Rotation: 1
Overscan: 0
Vrr: incapable
RgbRange: unknown
HDR: enabled
SDR brightness: 500 nits
SDR gamut wideness: 0%
Peak brightness: 1015 nits, overridden with: 1015 nits
Max average brightness: 604 nits
Min brightness: 0 nits
Wide Color Gamut: enabled
ICC profile: none
Color profile source: sRGB
Color power preference: prefer efficiency and performance
Brightness control: supported, set to 100% and dimming to 100%
Color resolution: automatic (8), range: [8; 16] bits per color
Allow EDR: unsupported
Perhaps interestingly ... the display port mode (to try some options) on the monitor to 1.4 and back to 2.1 made it come back. Changing back to 1.4 fixed it, but then coming back to 2.1 made it come back. So, perhaps the DisplayPort renegotiation is enough to reset whatever is happening as well.
I turned off VRR / FreeSync Premium on the monitor side BEFORE switching back to DisplayPort 2.1 this time; so I'll be curious to see if it comes back / if perhaps that itself did something.
Do you want a screen recording in software, or a video on my phone next time it happens?
Since this does sound like a driver issue, your best bet is to report it via https://gitlab.freedesktop.org/drm/amd/-/issues/ . I'll leave this in NEEDSINFO in case they say there's something we need to address on the KDE side. I had an instance of this where launching a game didn't fix it; closing this in favor of: https://gitlab.freedesktop.org/drm/amd/-/issues/4638 |