Ive just installed Ubuntu on my desktop pc getting rid of windows completely, and everything except the audio is working. Ive got a creative x-fi sound card but ive just removed it as it doesn't seem to be supported yet and I thought it could be causing conflicts. Im currently attempting to use onboard audio (my motherboards the asus a8n-sli premium) but it still doesnt seem to be working. In the sound preferences it lists two soundcards, the nvidia ck804 and the MPU-401 UART, then in the volume control the devices are: Nvidia ck804 (alsa mixer) and realtek alc850 rev 0 (oss mixer). If anyone could help it would be greatly appreciated, thanks.