I did not try my internal sound. But I think you just have to patch your DSDT ans install Mirones AHDA.kext for ALC889.
hi Ricksterm ,I d like to know if your motherboard is a z68ap-d3 ,I got it but sound doesn t work on dp1
Hi Ryman ,I m interested to know if you got sound on 889 ; I think you have the same motherboard as me ;z68ap-d3 rev2 running dp1
Patch for DSDT: