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Hi guys, I successfully installed Mountain Lion, everything works perfectly (I have a P8Z68v mb, i5 sandy bridge). I just got the sound working great with the alc892 dsdt patch, kext and applehda, but when there is no sound, after 30 seconds it seems like the soundcard goes to sleep and I get noise from my speakers, like they aren't plugged. Any way of telling it not to go idle ? it works greats otherwise.