Did you reinstall the same nvidia drivers or a newer version?
Right now I'm again running the original drivers (460.73.01) installed from the .run file.
IIRC there once was the necessity to chmod /dev/nvidia or similar to
make it available to all users. Not sure if that's still required.
The permissions look correct. There are /dev/nvidia0 and /dev/nvidia1 devices for the 2 GPUs:
# ll /dev/nvidia*
crw-rw-rw-. 1 root root 195, 0 Oct 19 09:58 /dev/nvidia0
Just to be sure: are you connecting to the local X server (a so called
shadow session) or are you starting a NEW mate desktop in addition to
X server?
I don't think so but how can I tell? I am not connecting with X2Go/X11 Desktop Sharing if that's what opens a shadow session, but rather starting a MATE session.
> WebGL creation failed:
> * Refused to create native OpenGL context because of blacklist entry: FEATURE_FAILURE_OPENGL_1
> * Exhausted GL driver options.
>
> Running "__GLX_VENDOR_LIBRARY_NAME=mesa LIBGL_ALWAYS_SOFTWARE=1 firefox" didn't get WebGL working, either, but did change the about:support output:
>
> WebGL creation failed:
> * Refused to create native OpenGL context because of blacklist entry: FEATURE_FAILURE_GLXTEST_FAILED
> * Exhausted GL driver options.
Does this call work with glxinfo/glxgears?
Yes, it does. glxgears runs without crashing the session and glxinfo reports it is using direct rendering. It appears to be using my client's (a VM) X server for OpenGL rendering, is that right?
$ __GLX_VENDOR_LIBRARY_NAME=mesa LIBGL_ALWAYS_SOFTWARE=1 glxinfo
...
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: llvmpipe (LLVM 7.0, 256 bits)
OpenGL version string: 2.1 Mesa 18.3.4
OpenGL shading language version string: 1.20
> Any idea how I can get WebGL rendered in an X2Go session again? I would assume that there wasn't a solution using X2Go if I hadn't used it successfully myself mere days ago. I intend not to use VNC if at all possible.
I am a bit puzzled about that blacklist entry. Maybe that is
modifiable in about:config. I have checked my firefox88 and it does
NOT seem to have this blacklist entry in about:config.
Also check/disable the hardware acceleration setting in firefox.
I tried setting webgl.force-enabled to true and got different output from about:support:
WebGL creation failed:
* tryNativeGL
* Exhausted GL driver options.
I've tried toggling hardware acceleration on/off but it doesn't seem to make a difference.
Uli