disable pcm/internal speaker

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http://forums.fedoraforum.org – Running FC12 on Dell optiplex 745, Intel's 82801H and using Pulse (did not change anything from fresh install). Sound works great, but for some reason, I can not disable the internal speaker that sits on the motherboard. meaning, if I play something it comes out from the audio output in the back (its going to amplifier) and also from the friggin internal speaker, a bit annoying... I've been installing all kind of pulse management tools, can't find how to disable this. didn't find anything in the board's BIOS. I don't see pcskpr loaded (I guess its not used anymore). Thanks. (HowTos)