Using aplay -l I got the sound working on Mythbuntu 10.10 using ALSA: plughw:1,7.
How do I repeat the success outside the mythtv system?
I have installed the alsa backports and when I F6 in alsamixer and choose the Nvidia card, all the channels say '00' (ie. not mute) but I'm unable to change the levels which are at zero.
I'd appreciate a hand in the right direction.