I’m in the exact same boat with a N150 that is doing the exact same thing (also an Alder Lake N processor). It appears as thought here is a guide to replace MPV (HTPC Tips and Tricks) but I haven’t tried that. Presently, I’m using Plex HTPC on Windows but am eager to switch it to Linux once HTPC is working on the Alder Lake N processors. If you give the guide a try and get it working, do post back as I may follow the same.