Nearly week ago decided to stop fighting with getting sound working on my new DFI RS482 mainboard and reported bug in Linux bugtracker. After few days and few patches from Dan Carpenter I have sound working. No more atiixp: codec read timeout messages, just working music.
If someone has this problem then here is solution (until it will get resolved finally in mainline):
- unpack kernel sources
- fetch this patch
- build kernel and modules
modprobe snd-atiixp ac97_codec=0- run audio player
Now it is time to wait until this will go into mainline.