I have an MD running on an Zotac ZBOX. I have had it running just fine with video through HDMI and AUDIO thru fiber, but decided to eliminate some cables. I followed the instructions for adding asound.conf etc. I can hear sound though mplayer, but no go through Xine. I also do not get any output (sound,video) when sending the signal to my stereo amplifier first. Only way to get either of them is to send to straight to TV. I can see the boot sequence when going through the amp but once Linuxmce comes up I loose all video.
I can always go back to sound through fiber but that is a bit defeatist in purpose.