Comment 5 for bug 102818

Confirmed (again) on a MacBook CoreDuo 2.0Ghz, Feisty Fawn clean instal.
I am a total *nix newbie, but I suspect that the sound device is behaving as if it were a multi-speaker system, and not a set of stereo speakers. That is, I suspect that the device is advertising the third or center speaker to the driver as a third speaker (rather than acting nice and just summing the stereo signal), and the driver is then getting confused and not reporting the speakers accurately to alsamixer. Has this problem been addressed elsewhere? It's well past release time now...