[alsa-devel] HDA Power management.

Ok, I've been studying the code for a couple of weeks now, and testing on a mobile type development platform with a Realtek ALC262, but I have not been able to get the audio codec to enter low power mode (D3). I can see it switch when running that other OS. When running, the chip draws ~400mw, but drops to 40mw after switching to low power mode. How do I get it to do the same with the current driver? I'm using the git tip for alsa, and 2.6.26 final kernel.

I have tried setting the power mode to D3 using the hda-tool from Takashi, but the codec reverts to D0 (full power) after a second or two, even though there is nothing touching the audio in my test environment.