[vdr] No ac3 audio on Nexus

I'm using linux 2.6.22.6 with v4l drivers. I'm using a Nexus for audio/video out. I am trying to add an ATSC card and it seems atsc only sends ac3 audio. So I have no audio on any of the channels. I tried connecting the ac3 audio and I get audio out it with normal audio, But if I turn on "Use Dolby display Digital" and select DD audio on a channel with DD, I loose audio on both the ac3 channel and the normal audio ports. If I play a DVD it always starts the dvd with normal audio and when I select ac3 audio goes out even if I switch back to normal until I stop and restart the dvd. If I select one of the other audio channels on the dvd, vdr totally locks up. This happens with both vdr-1.5.10 and 1.6.0.