Bug 445298

Summary:	[Wayland] unplugging a screen causes some applications to use 100% CPU load
Product:	[Plasma] kwin	Reporter:	Germano Massullo (Thetra) <germano.massullo>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.23.2
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	GDB KeepassXC GDB Konsole

Description Germano Massullo (Thetra) 2021-11-10 22:05:50 UTC

My laptop when it's connected to an external screen, disables its screen to just let me use the external monitor.
The external monitor has various inputs and I have connected various computers to it.
As soon I selected another video input on the external screen, my laptop started to behave in a strange way, for example it acted like if the screen has been unplugged. Moreover the most important thing is that various applications crashed (Firefox Wayland) or started to use 100% CPU load (Konsole, KeepassXC).
I attach GDB trace of Konsole and KeepassXC while using 100% CPU load

plasma 5.23.2
KDE Frameworks 5.87.0
Qt 5.15.2

Comment 1 Germano Massullo (Thetra) 2021-11-10 22:06:19 UTC

Created attachment 143425 [details]
GDB KeepassXC

Comment 2 Germano Massullo (Thetra) 2021-11-10 22:06:37 UTC

Created attachment 143426 [details]
GDB Konsole

Comment 3 David Edmundson 2023-09-06 10:38:20 UTC

This bug was reported against an outdated version of KWin. We have made many changes since the. 
If the issue persists in newer versions can you reopen the bug report updating the version number.