Bug 596056 – kde-plasma/plasma-workspace: plasmashell lags and artifacts when Unreal Engine is running

• Product: Gentoo Linux
• Status: RESOLVED UPSTREAM

[Description brothermechanic 2016-10-03 16:02:37 UTC]

Hello
My system is Asus G75VW
Gentoo ~amd64
nvidia gtx660m

When Unreal Engine 4.11 is running i get terrible artifacts on all kde5 versions (kde4 was better) like don't updating panel,
screen slow updates, black restangles 1-2 second when i close window, screen tearing, etc

Please hear to me and may be fix it.
Thank you!

Unreal Engine works fine!

[Comment 1 brothermechanic 2016-10-03 16:45:19 UTC]

I found 
when i change renderer to opengl 3 or 2 artefacts is gone
But this is don't useful

[Comment 2 brothermechanic 2016-10-03 16:53:56 UTC]

But every time when unreal open new window artifacts back

[Comment 3 Andrei Slavoiu 2016-10-03 19:25:24 UTC]

I'm not a Gentoo dev but a fellow KDE user that never saw such problems. The information you posted so far here is not enough for someone trying to understand the problem / reproduce it. First, Unreal Engine is, well..., an engine. What application based on it do you run? Do you run it fullscreen and ALT+TAB out of it or in a window? Also, the output of the following commands would be useful:

emerge --info kwin
glxinfo

[Comment 4 brothermechanic 2016-10-04 05:07:47 UTC]

emerge --info kwin | wgetpaste
Your paste can be seen here: https://paste.pound-python.org/show/a0a6PxTYWiyPFavRZdU4/

glxinfo | wgetpaste
Your paste can be seen here: https://paste.pound-python.org/show/LvWIGGv66x8h0p0ymfZj/

I use Unreal Editor 4.11 in window mode

[Comment 5 brothermechanic 2016-10-04 06:21:16 UTC]

http://i.imgur.com/e2qkqDX.png

[Comment 6 Andreas Sturmlechner 2016-10-15 15:38:30 UTC]

Try adding a window rule (right click title bar → more actions → special behavior for this application) and then on the "appearance & fixes" tab do "block compositing" → "enforce" → "No"

[Comment 7 brothermechanic 2016-10-31 05:21:19 UTC]

i think the problem is in plasmashell

[Comment 8 Johannes Huber (RETIRED) 2016-10-31 07:31:30 UTC]

Not a packaging issue. Please report upstream.