Then to confirm, I did docker exec -it jellyfin nvidia-smi Which responded with my GPU. Note that (for me) the “processes” part of nvidia-smi comes up blank, even when Jellyfin is using it. I can tell it is working though from jellyfin logs and when it is not using it, instead of being blank it says “no processes”
Edit for formatting and to add that I believe I also had to add an environment variable to jellyfin (I am using lsio’s version)