On 10/16/2010 08:37 PM, Fábio Magnoni wrote: > Hello Mike, > > Thanks for your help, but I tried and didn't work. > > I remeber that on Ubuntu 9.10 my 5.1 worked, since 10.04 it doesn't work Hello Fábio, Try the linux-backports-modules-alsa-lucid-generic package. And what does aplay -l output? And lspci | grep -i audio ? Best, Jeremy