Gilbert17

As mentioned in the Plex Forum you have to add the Graphics card to the Container setting so that the Container/Plex can access it and can use it for hardware acceleration. I also found this reddit post, where they fix this Problem for Synology NAS. Reddit

Did you map your iGPU so Docker can access it? I found this post in the Plex forum where they also struggled to get hardware acceleartion working in docker. Plex Forum There you find how to do it.

You have to install Driver extension for your network adapter. You can download the extension here. Your Mainboard and CPU should work fine. As mentioned in this post you might get problems with the DS916+ image because your CPU is 4 years older and might don't support all instructions. Via serial Port you can check if its loading all drivers or if you getting some other errors. I'm not quite sure but i think you also need a valid serial number for hardware transcoding. If you have installed the network extension and still can't find/boot it try the DS3615xs image.