Hey there,
After days and weeks I wasn't able to get VAAPI working.
HW specs:
Intel i3 6100 Skylake s1151
ASRock B150M Pro4V mainboard
Running OMV3.
/dev/dri/card0 and render128 are present
vainfo returns:
Bash
error: XDG_RUNTIME_DIR not set in the environment.
libva info: VA-API version 0.36.0
libva info: va_getDriverName() returns -1
libva error: va_getDriverName() failed with unknown libva error,driver_name=(null)
vaInitialize failed with error code -1 (unknown libva error),exitDISPLAY=:0 vainfo returns:
Bash
error: XDG_RUNTIME_DIR not set in the environment.
error: can't connect to X server!
libva info: VA-API version 0.36.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_36
libva error: /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so init failed
libva info: va_openDriver() returns -1
vaInitialize failed with error code -1 (unknown libva error),exitCould somebody please give me a hint or - even better - a final solution? 
