Bug 466820

Summary:	Flickering when starting X11 session with 6.2.1 / 6.2.2
Product:	[Plasma] kwin	Reporter:	David <punkrock.boy>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	major	CC:	nate
Priority:	NOR
Version:	5.27.2
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:

Description David 2023-03-04 10:50:10 UTC

SUMMARY
***
Using AMD iGPU of my AM5 on the Host, as soon as I start my Computer with Kernel 6.2.1 / 6.2.2 the screen starts flickering. I could narrow it down thanks to the help in the arch forums https://bbs.archlinux.org/viewtopic.php?pid=2087933#p2087933 to the compositor, currently writing this on 6.2 and x11 with suspended the compositor (SHIFT+alt+F12) to remove the flickering.
***


STEPS TO REPRODUCE
1. Arch installation with current 6.1 LTS and 6.2
2. Boot 6.2 and Login to X11 User Session -> Flickering
3. Reboot to 6.1 LTS and Login to X11 User Session -> no Flickering
4. Boot 6.2 and Login to X11 User Session -> Flickering, Disable compositor (SHIFT+alt+F12) -> no Flickering

OBSERVED RESULT
Links to two videos: https://imgur.com/E712RcP https://imgur.com/TKhXO5l

EXPECTED RESULT
No flickering with enabled compositor on X11 

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.2
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.2.2-arch1-1 (64-bit) / LTS 6.1.14-1-arch1 (64-bit)
Graphics Platform: X11

ADDITIONAL INFORMATION
Processors: 32 × AMD Ryzen 9 7950X 16-Core Processor
Memory: 62.0 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: ASUS

Comment 1 David 2023-03-13 06:16:20 UTC

If there is anything that I can provide (logs etc) please let me know which one you'll need etc.

Comment 2 David 2023-04-02 16:05:31 UTC

Okay seems that one is fixed - not sure why/how/which package it was but latest updates/packages on 6.2 solved the flickering in picom and kwin.

Comment 3 David 2023-04-02 16:06:39 UTC

Fixed