This happens to me too (with ICH7 family chipset).
I also get weird headphone behaviour, where sometimes the headphones refuse to work and sound comes out of the internal speakers no matter what I do.
I suspect that the detection of headphones is somewhat broken, and perhaps the 'no sound' problem is related. Perhaps the sound is directed to the headphone jack, but as line out?
This happens to me too (with ICH7 family chipset).
I also get weird headphone behaviour, where sometimes the headphones refuse to work and sound comes out of the internal speakers no matter what I do.
I suspect that the detection of headphones is somewhat broken, and perhaps the 'no sound' problem is related. Perhaps the sound is directed to the headphone jack, but as line out?