config.plist is corrupt
AppleHDA.kext not attached.
Installation: use Post #1/cloverALC
I just solved this today (finally) with my own system. I finally solved by re-doing the SSDT. Attached is the SSDT that I used, but obviously this depends a bit upon your motherboard.
This is for my ASUS P9X79 PRO. You could strip it down to just the HDEF section, per Toleda's many guides.