Intel Arc GPU. Had to enable a few modules, reboot, debug, follow the jellyfin docs for writing to some configs, reboot, didn’t work. Follow the error messages which are pretty much useless, get pointed to stuff that isn’t relevant. Finally someone on a forum had a good reply where they told me I have to download the entire linux proprietary firmware directory, extract the i915 folder from it, and plop it in my firmware folder and reboot. Then everything loaded and hwacceleration worked.