Step 1) Check /dev/dri for the GPU

user@debian:~/compose$ ls /dev/dri
total 0
drwxr-xr-x  3 root root        120 Jan 25 11:50 .
drwxr-xr-x 18 root root       3360 Feb 11 03:03 ..
drwxr-xr-x  2 root root        100 Jan 25 11:50 by-path
crw-rw----  1 root video  226,   0 Jan 25 11:50 card0
crw-rw----  1 root video  226,   1 Jan 25 16:39 card1
crw-rw----  1 root render 226, 128 Jan 25 11:50 renderD128

Documentation indicates renderD128 typically refers to Intel GPU’s

Make sure at least one renderD* device exists in /dev/dri. Otherwise upgrade your kernel or enable the iGPU in the BIOS.

2. Edit your docker-compose.yaml and specify this In your Jellyfin block

devices:
 - /dev/dri/renderD128:/dev/dri/renderD128

3. Start your container and enter it to verify the device is accessible.

sudo docker compose up -d; sudo docker exec -it jellyfin bash

Once inside ls /dev/dri to confirm the GPU is detected, then you can exit the container.

4. On the Jellyfin dashboard go to the hardware acceleration page and follow the notes left by Jellyfin devs.

Image