Bug 447669

Summary:	Xorg crash when zooming or changing brightness in Plasma/X11 session
Product:	[Plasma] kwin	Reporter:	ratijas <me>
Component:	platform-x11-standalone	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal
Priority:	NOR
Version First Reported In:	git master
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description ratijas 2021-12-29 22:27:59 UTC

SUMMARY

At first log in, such usual actions as changing monitor brightness or zooming in (KWin effect), consistently crashes the whole X11 session, which in turn throws back to the SDDM greeting screen.

Starting from second log in onward, sessions won't crash again until reboot.

STEPS TO REPRODUCE
1. Reboot the computer.
2. Log in into Plasma/X11 session
3. Change brightness via keyboard (special brightness keys), or zoom in (Meta++)

OBSERVED RESULT

Xorg crashes, bringing down the whole Plasma session as well as all and any running applications

EXPECTED RESULT

Shtability.

SOFTWARE/OS VERSIONS

Operating System: Arch Linux
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2
Kernel Version: 5.15.11-arch2-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2

nvidia: 495.46-5
xorg-server: 21.1.2-2

ADDITIONAL INFORMATION

Backtraces are very long, so I'm posting those as GitLab snippets instead of inlining here.

https://invent.kde.org/-/snippets/2025

Comment 1 ratijas 2022-02-05 15:19:19 UTC

Related bug reports:

- https://gitlab.freedesktop.org/xorg/xserver/-/issues/1297
- https://bugs.archlinux.org/task/73031

Closing as an upstream issue.