You have to only replace the bz* files and the changes.txt file if you want to upgrade…   Exactly, but since I‘m only testing whats currently possible with ARC I don‘t have to do this currently.   This is also not entirely true… have you compiled the Kernel yourself? Maybe something went wrong there since I have no issue usig the card with Emby. I‘m not too sure about Plex because I don‘t know if they are using QuickSync (which is not ready yet for ARC) but if they