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I was having the same problem with no audio after updating to 10.8.5 on a X58A-UD3R board with ALC889. After trying all the suggestions and checking and patching my DSDT, I still could not get sound back. My IOReg keep reporting that my layout_id is 0x79 0x03 0x00 0x00 even though the DSDT...

I am sorry to report that adding CUDA to my system did not completely stop the error: NVDA(OpenGL): Channel timeout! After getting this error message, my screen hangs after waking up from a monitor sleep. I had Safari running, which is a common thread to getting this error.

I like to report that this version of the driver also seems to solve my issue of Safari causing a hang after waking up from a monitor sleep. I was also getting "channel timeout" errors in my log. However, it was not an easy journey for me in applying this fix. Here are my experiences: 1...