I had tried everything in the guide, except for the first step. nvidia-smi showed my device correctly (I believe it did so before I made any changes…).
That said, before doing any further changes I did the test from the guide and it looks like transcoding is actually already working for me. I see the “(hw)” tag in the now playing window.
The confusing thing is that, in the Plex settings, the “Hardware transcoding device” drop-down only has “Auto” and does not list a device. When GPU passthrough was set up via Truecharts, the device did appear in this drop-down.
I realize this may be a more Plex-specific question at this point. But, do you know if it’s expected in some cases to not see your GPU in that list and it’s really working ok (based on the “(hw)” tag)?