Cannot open offsreen window on Linux cluster

[rdb]

Are you running any X11 server at all?

If you are using an NVIDIA GPU, you can do something like this to use a headless X11 server:

Code working with pandagl but not p3tinydisplay

You can render headless with the accelerated NVIDIA drivers in OpenGL mode, which is what I would recommend - it would give you best performance and gives you access to the widest range of supported features. I happen to have researched this in the past, so I’ve dug up my old notes. You would need to run an X11 server but with no display attached, but some trickery is needed in your Xorg configuration to make this work. Here is the xorg.conf I used in the past to accomplish this. Section "Se…