Bug 505607

Summary:	Screen content mangled around after sleep [radeon]
Product:	[Plasma] kwin	Reporter:	Tech-Tac <im.tech.tac>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	6.3.5
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Distorted desktop after blindly logging in

Description Tech-Tac 2025-06-14 20:43:31 UTC

SUMMARY
Sometimes (not clear when exactly), after waking the device up after RAM sleep and/or disk hibernation, the whole screen except for the mouse cursor appears mangled around in a sort of blocky horizontal stripy pattern.

This behavior has been observed on Wayland a desktop and a laptop running AMD Radeon HD 7560D and AMD Radeon R6/R7 respectively, with the former being on Arch and the latter on Fedora (and previously Kubuntu).

A workaround I found was to switch to another TTY and back again, seems to reset something.

STEPS TO REPRODUCE
1. Go into sleep mode
2. Wait some time (just in case, not sure about this step)
3. Wake up device

OBSERVED RESULT
There is a big chance the lock screen and subsequently the desktop all render distorted, with the mouse cursor rendering fine on top.

EXPECTED RESULT
Screen renders correctly

SOFTWARE/OS VERSIONS
Linux: Arch, Kubuntu 25.04, Fedora 42
KDE Plasma Version: 6.3.x
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0

Comment 1 Tech-Tac 2025-06-14 20:49:59 UTC

Created attachment 182274 [details]
Distorted desktop after blindly logging in

Taken with a phone camera, this bug is not visible in screenshots.