Two GPU and their assigment to /dev/dri/renderD...

R

reah

Member
Dec 31, 2023
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Hello,

I am running a Proxmox host (9.1.7) with two GPUs (AMD iGPU and NVIDIA dGPU (well actually three when counting the BMC's VGA)). I'm using them in different LXC which works flawless. The iGPU I use for Jellyfin transcoding, assignment is done so:
dev0: /dev/dri/card2,gid=44
dev1: /dev/dri/renderD129,gid=106

Now the issue: The DRM device nodes under /dev/dri/ (e.g. card0, card1, renderD128, renderD129) are assigned dynamically at boot, so the mapping between device nodes and physical GPUs changes from boot to boot and I then have to find out which is which, reconfigure the config and start up Jellyfin manually.

So what I need is a robust way to:
  1. Pass a specific GPU into my Jellyfin LXC container,
  2. Ensure the mapping remains stable across reboots,
  3. Have correct permissions (e.g. root:video) inside the container,
What would be the recommended approach to achieve stable, selective GPU passthrough for DRM devices in LXC/Proxmox environments?

Regards,
Reah
 
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