Hy,
This is the result of the test i did on GA-EP45-DS4 + AL889a :
Outputs devices:Unknow = sounds output on all analog prots like if they were only one port.
Headphones = working fine
SPDIF-out = not working (it's set to AC3 in the dump)
Inputs devices:Mic = not working
Mic = not working
SPDIF-in = untested
Mute is working fine and Balance too.
After sleep the sound is crappy, it's look like a sample frequency problem. @44,1Khz the sound is distorded and @192Khz it's worst, there some kind of delay/echo plus the distortion.