Bug 396007

Summary:	On-screen preview is messed up when switching between applications/desktops with OpenGL enabled
Product:	[Plasma] kwin	Reporter:	Xavion <Xavion.0>
Component:	scene-opengl	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	Xavion.0
Priority:	NOR
Version First Reported In:	5.13.2
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Switching between applications Switching between desktops KWin runtime details

Description Xavion 2018-06-30 00:40:12 UTC

When switching between applications or desktops, the on-screen preview is always messed up if I'm using OpenGL for compositing.  It has been like this for as long as I can remember.  I'm finally getting around to notifying you of the problem.

I will attach a couple of desktop recordings shortly.  In them, you'll see that I attempt each maneuver with OpenGL and then XRender.  The problems only occur in the former case.  Also, it makes no difference whether I'm using OpenGL v2.0 or v3.1.

If you'd like to know any aspect(s) of my system, tell me which command(s) to run in order to get them.  For now, I will say that I'm using an Intel graphics card and that KMS is enabled.  These are the only rendering problems I'm experiencing.

Comment 1 Xavion 2018-06-30 00:41:49 UTC

Created attachment 113651 [details]
Switching between applications

Comment 2 Xavion 2018-06-30 00:42:22 UTC

Created attachment 113652 [details]
Switching between desktops

Comment 3 Martin Flöser 2018-06-30 06:13:26 UTC

Please provide the output of qdbus org.kde.KWin /KWin supportInformation

Comment 4 Xavion 2018-07-01 00:19:47 UTC

Created attachment 113662 [details]
KWin runtime details

Comment 5 Martin Flöser 2018-07-01 05:29:22 UTC

You are using EGL. This is not supported, please change back to glx.