- I haven't figured out how to enter fullscreen mode.
Well, AFAIK this is mentioned in the README. There are a couple of switches/options for the plugin start, one of them is "-f" for full screen. An other one is "-d" for the correct display and "-x" to start xorg by the plugin. And no, there is no need for a display manager, I wonder where you got this information ... most of us do test the plugin on existing Linux desktop installtion, because there's quit a way to go ...
But VDPAU is IMHO closed to be ready for production use, but not VA-API or even XvBA ...
Since author "johns" AFAIK isn't dealing with this mailing list, you could place your questions here in this tread:
http://www.vdr-portal.de/board17-developer/board21-vdr-plugins/109700-softhd device-software-vdpau-va-api-cpu-decoder-und-ausgabe-plugin/?s=b83100f9ae841 a9015a5769eb450a5611c1c7cb8
Don't worry just post in english, you'll get the answer also in english. Or feel free to open a new one in english, you will get answers in english ... ;-)
Regards fnu