Something weird happe ed to my unraid as well. I had to remove SR-IOV because the igpu comepletely vanished. However, now hw transcoding still works and im okay with that.
i have the intel gpu top plugin, but i do not see where i can load drivers for the card. i believe they are natively installed by linux. I am not sure.
I bought an arc b580 for my unraid machine only to find out that it will not hardware decode for plex, nor will my i7-265k's igpu? Am I just screwed or am I doing something wrong. Help me please.