Bug 503008

Summary:	Plasma glitches and crashes after update to Linux 6.14.2
Product:	[Plasma] plasmashell	Reporter:	redford <redford>
Component:	generic-crash	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	crash	CC:	nate, redford
Priority:	NOR
Version First Reported In:	6.3.4
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description redford 2025-04-19 10:43:50 UTC

SUMMARY

After updating my kernel from 6.13.2 to 6.14.2 I started to experience multiple glitches and hangs in Plasma.

STEPS TO REPRODUCE
1. Update Linux to 6.14.2.

OBSERVED RESULT
Multiple hangs and glitches: Right after boot my desktop is completely unresponsive for ~30 seconds, clicking stuff in the taskbar doesn't do anything. The Wi-Fi doesn't connect. Sometimes it crashes (I assume), because the taskbar disappears and then after a few seconds appears again.
When shutting down there's a ~15 seconds hang with some errors on the screen about watchdog (I guess some process is not responding?).

EXPECTED RESULT
Plasma works normally.

SOFTWARE/OS VERSIONS
OS: Arch Linux
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.9.0

ADDITIONAL INFORMATION

Rolling back to Linux 6.13.2 fixes all the issues. The glitches are persistent and reproducible across reboots on 6.14.2.

I can provide more debug logs and test something if you tell me where to look / what to do. The problem seems to be fully reproducible.

Comment 1 Nate Graham 2025-04-23 07:49:16 UTC

It sounds like a bad kernel update if it's caused so much havoc across so many parts of the system, and if an older version fixes the issues. I'd recommend talking to your distro about it.