Bug 445118

Summary:	strange flicker in the titlebar under special conditions
Product:	[Plasma] kwin	Reporter:	elypter <elypter>
Component:	aurorae	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	elypter, nate
Priority:	NOR
Version:	5.23.2
Target Milestone:	---
Platform:	Other
OS:	Other
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	flickering titlebar

Description elypter 2021-11-07 15:01:47 UTC

SUMMARY

when positioning windows in a certain way parts of the titlebar are flickering

STEPS TO REPRODUCE
1. open 2 windows of librefox(i assume firefox works as well)
2. in one of them open an animated gif (eg: https://www.redditstatic.com/gold/awards/icon/Illuminati_48.png)
3. open a third application and place it so that the titlebar is over the position where the animated gif is displayed in the browser window.
4. layer the windows in the following order from bottom to top. librefox with gif, random librefox page, thrid application

OBSERVED RESULT

the flicker appears to be timed randomly

EXPECTED RESULT

no flicker

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS
KDE Plasma Version: 5.23.2
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.2
Kernel Version: 5.14.16-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 12 × AMD Ryzen 5 5500U with Radeon Graphics
Memory: 7.1 GiB of RAM
Graphics Processor: AMD RENOIR

ADDITIONAL INFORMATION
for window decorations i use material

Comment 1 Nate Graham 2021-11-08 22:37:37 UTC

Any chance you could attach a screen recording that shows the issue? That would be helpful.

Comment 2 elypter 2021-11-09 19:32:26 UTC

Created attachment 143381 [details]
flickering titlebar

sorry, i already made one but forgot to attach it

Comment 3 Nate Graham 2021-11-10 15:48:05 UTC

Thanks!

Comment 4 David Edmundson 2023-09-06 10:38:44 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This bug was reported against an outdated version of KWin.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.