Jellyfin

Install the jellyfin-ffmpeg5 package. Remove the deprecated jellyfin meta package if it breaks the dependencies:

sudo apt update && sudo apt install -y jellyfin-ffmpeg5

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

ls -l /dev/dri

Add the jellyfin user to the render group, then restart jellyfin service:

sudo usermod -aG render jellyfin
sudo systemctl restart jellyfin

Show Intel GPU usage

sudo intel_gpu_top