Bug 362208

Summary:	Screen blinking after leaving full screen app (mpv)
Product:	[Plasma] kwin	Reporter:	Marcelo Bossoni <mmbossoni>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version:	5.6.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=361154
Latest Commit:		Version Fixed In:
Attachments:	Support information

Description Marcelo Bossoni 2016-04-24 22:31:31 UTC

After switching off fullscreen MPV window screen starts blinking
Enabling disable compositor for full screen windows fixes the problem for full screen, but screen starts blinking for dialogs and other stuff

Reproducible: Always

Steps to Reproduce:
1. Go full screen
2. Leave full screen

Comment 1 Marcelo Bossoni 2016-04-24 22:32:18 UTC

Video:
https://drive.google.com/file/d/0BzXlzIyJc44kRDA2ZVZYbjJkUkU/view?usp=sharing

Comment 2 Marcelo Bossoni 2016-04-24 22:32:47 UTC

Created attachment 98571 [details]
Support information

Comment 3 Marcelo Bossoni 2016-04-24 22:42:17 UTC

Don't know if that helps but, I use a nvidia card with binary drivers.
When I enable the effect to show updated parts of the screen it blinks like crazy and shows the mpv video screen being updated, even when behind another maximized window.

I also use export __GL_YIELD="USLEEP" in my environment

Comment 4 Marcelo Bossoni 2016-04-30 23:05:35 UTC

Notice what may be the cause:
I'm currently playing Transistor game (Steam).
As soon as I leave the game, that issue start to occur.
Also, if I disable the compositing (Alt + Shift + F12), my taskbar shows two more tasks: Steam and Transistor game.
Maybe Kwin is holding the tasks? Or at least their icons? As far as I can tell the processes are dead since there is no trace of them in ps command output.

Comment 5 Thomas Lübking 2016-05-01 07:42:12 UTC

KWin cannot "hold tasks" - the taskbar and kwin operate on common information, though.
The problem will be related to bug #361154
Instead of fullscreen unredirection, try to downforce the compositor blocking through "kcmshell5 kwinrules" (see https://bugs.kde.org/show_bug.cgi?id=361154#c41 and ignore the snarky tone) or explicitly suspend the compositor before running the game.

Comment 6 Marcelo Bossoni 2016-05-01 14:44:04 UTC

There seems to be the same bug, thanks.
I confirm that disabling compositing before opening the game worked.

Comment 7 Thomas Lübking 2016-05-01 21:36:23 UTC


*** This bug has been marked as a duplicate of bug 361154 ***