Bug 371912

Summary:	compositing disabled on nvidia drivers
Product:	[Plasma] kwin	Reporter:	adarmalik
Component:	scene-opengl	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	iamgrief
Priority:	NOR
Version First Reported In:	5.8.2
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	glxinfo output kwinrc

Description adarmalik 2016-10-31 20:34:37 UTC

Compositing stopped working lately. Not sure if it was after upgrading the nvidia proprietary drivers or kwin.
I am on openSuse leap 42.1 with the KF5 repos enabled. It seems the driver is not recognized.

qdbus org.kde.KWin /Compositor org.kde.kwin.Compositing.resume             
OpenGL vendor string:
OpenGL renderer string:
OpenGL version string:
OpenGL shading language version string: 
Driver:                                 Unknown
Driver version:                         0.0
GPU class:                              Unknown
OpenGL version:                         0.0
GLSL version:                           0.0
X server version:                       1.17.2
Linux kernel version:                   4.1.34
Requires strict binding:                yes
GLSL shaders:                           yes
Texture NPOT support:                   no
Virtual Machine:                        no
kwin_core: Failed to initialize compositing, compositing disabled


glxinfo seems to know about the driver

name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4

Comment 1 Martin Flöser 2016-10-31 22:01:45 UTC

Can you please attach the full output of glxinfo

Comment 2 adarmalik 2016-11-02 06:45:27 UTC

Created attachment 101953 [details]
glxinfo output

Comment 3 Martin Flöser 2016-11-02 08:17:00 UTC

very weird. For whatever reason we fail to read things like glGetString. But the reading of the extensions seems to work. E.g. GLSL shaders is detected. Which would indicate that some gl calls work.

I think I have seen something like that before. Could it be that you try to use EGL instead of GLX? Could you please attach your ~/.config/kwinrc?

Comment 4 adarmalik 2016-11-02 19:30:23 UTC

Created attachment 101981 [details]
kwinrc

Comment 5 adarmalik 2016-11-02 19:31:20 UTC

hmm, kwinrc has the line
GLPlatformInterface=egl

that looks wrong

Comment 6 adarmalik 2016-11-02 19:38:12 UTC

I removed that line and it started working again.
Martin, you are the man! :) Thanks a LOT

Comment 7 Martin Flöser 2016-11-03 06:18:46 UTC

Great. I mark as upstream as it's a problem of NVIDIA+EGL

Comment 8 Grief 2017-05-04 16:08:59 UTC

Thanks for the solution. Can confirm that during one of the upgrades this string (GLPlatformInterface=egl) appeared in ~/.config/kwinrc for some reason. After removal of that line, openGL composing is back to work!