Hi,
I am using Mandrake 10.0 FR. I struggled to get a VIA82XX sound card working. It took me more than 2 weeks.
I did the following:
1) As root
chmod 666 /dev/dsp
2) I added the aRts Control to the panel. Then I executed the K Sound System (configuration -> Kde -> Sound -> Sound System) and pressed the Test Sound button. Then I could check that there was sound going on. I found a conflict with mic.
3) I went to Kmix, checked the Advanced check box and disabled IEC958 Cap.... And the sound came out.
I hope it works.