Bug 505203

Summary:	With NVIDIA GPU, preview for open windows sometimes stop displaying on panel
Product:	[Frameworks and Libraries] KPipeWire	Reporter:	zxvb12z
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	ahiemstra, aleixpol, kde, nate, xaver.hugl
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Preview journal

Description zxvb12z 2025-06-04 12:24:08 UTC

Created attachment 182025 [details]
Preview

SUMMARY
Preview for open windows stop displayed on panel. It happens at an accidental moment in time (or I can’t find the pattern). Sometimes it happens almost immediately after the session starts, Sometimes it doesn’t happen at all. Restart session solves problem. I was able to reproduce this problem three times, on different days.
If after the problem appears check system log, i see pipewire error messages (add log file)

STEPS TO REPRODUCE
1. start session
2. open some app
3. work and sometimes check preview

OBSERVED RESULT
window preview disappears.

EXPECTED RESULT
window preview not disappears

SOFTWARE/OS VERSIONS
Linux: Manjaro 25.0
KDE Plasma Version: 6.3.91, wayland
KDE Frameworks Version: 6.14
Qt Version: 6.9.1
Nvidia video driver: 575.57.08 witch close kernel module

ADDITIONAL INFORMATION
https://bugs.kde.org/show_bug.cgi?id=478309 I was able to find a similar old problem, maybe it will be useful too

Comment 1 zxvb12z 2025-06-04 12:26:39 UTC

Created attachment 182026 [details]
journal

Comment 2 Nate Graham 2025-06-04 15:43:16 UTC

Looks related:

 13:34	pipewire	pw.context:   Prop: key Spa:Pod:Object:Param:Format:Video:format (131073), flags 00000000
 13:34	pipewire	pw.context:     Choice: type Spa:Enum:Choice:Enum, flags 00000000 28 4
 13:34	pipewire	pw.context:       Id 12       (Spa:Enum:VideoFormat:BGRA)
 13:34	pipewire	pw.context:       Id 8        (Spa:Enum:VideoFormat:BGRx)
 13:34	pipewire	pw.link: (73.0.0 -> 67.0.0) negotiating -> error (no more input formats) (configure-configure)

Comment 3 zxvb12z 2025-06-13 15:01:06 UTC

This issue has not been repeated for the last few days. During this time, pipewire and qt package were updated several times. Probably the problem was related to any of these components and not with Plasma , sorry for the inconvenience.