ubuntu help please

[rasA4]

hi any experts on here??
i have a acer revo r3610 pc and i have installed ubuntu 10.04, however i have no sound from HDMI or optical out ive tried a few things googled and got nowhere

please help.....

 

[leshkin]

You're better off posting in the Ubuntu forum , as there are many more experts there than on an Audi forum