Bug 431669

Summary:	During cross-fade animation, an opaque window may become translucent
Product:	[Plasma] kwin	Reporter:	Mojahed Yavazi <mojahedai7>
Component:	scene-opengl	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	bugseforuns, kde
Priority:	NOR
Version First Reported In:	git master
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	window flash maximize flash other apps

Description Mojahed Yavazi 2021-01-16 06:01:52 UTC

SUMMARY
When I maximize or unmazimize a window in wayland session. The window flashes.

STEPS TO REPRODUCE
1. open a window
2. maximize or unmazimize window

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.20.80
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2
Kernel Version: 5.9.16-1
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-6500 CPU @ 3.20GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 530

Comment 1 Mojahed Yavazi 2021-01-16 06:09:02 UTC

Created attachment 134916 [details]
window flash

window flash when maximize

Comment 2 Vlad Zahorodnii 2021-01-18 09:30:12 UTC

Can you reproduce this bug with other applications? Also, can you reduce the animation speed in system settings please?

Comment 3 Mojahed Yavazi 2021-01-19 05:00:33 UTC

Created attachment 134987 [details]
maximize flash other apps

Window flash and show background for a second when maximize.

Comment 4 Vlad Zahorodnii 2021-01-19 08:51:10 UTC

Ah, I see. The cross-fade animations leaks the background because it's not implemented properly.

Comment 5 Patrick Silva 2021-05-31 14:24:49 UTC

I noticed this bug on neon unstable yesterday.

Comment 6 David Edmundson 2022-06-16 10:27:53 UTC

This is no longer an issue as described as we have no cross fade animations.