Run
as root, then run
as the user to use the sound device and applications, make sure to unmute things and set them the way you want. Then run
as root to save the settings. Well thats how I have always done it, mileage may vary.
I have never had a problem with the kernel detecting my integrated Intel audio devices before, but I am not going to make the claim that it should detect it on the auto though.
hth