Hey - Wanted to say I also have a IntelARC gpu for transcoding that is not playing nice with the HexOS Install.
Willing to help figure this out / test things however is needed. Just hit me up!
Model: https://www.asrock.com/Graphics-Card/Intel/Intel Arc A310 Low Profile 4GB/
CPU: Ryzen 3950x (No onboard graphics)
Board: https://www.gigabyte.com/in/Motherboard/X570-AORUS-ELITE-WIFI-rev-1x/sp#sp
Enabled the "Passthrough non-nvidia GPU" option, and Plex can see the GPU, but will not use it.
Plex Dashboard showing transcoding happening but no (hw) next to Transcode - meaning CPU transcoding is happening.
Plex showing the card as listed and selected as transcode device:
