Comment 44 for bug 996245

Same problem with OSX and this motherboard (1.0).

http://www.tonymacx86.com/audio/66618-ga-z77x-ud5h-audio-green-port-problem-solved-welding-2-resistances-3.html

Issue is fixed in rev 1.1. This is confirmed from multiple users. So, if you have this revision you are lucky :)

What about rev 1.0? Gigabyte refuses support for open source based OS's and probably won't fix. I am absolutely convinced that they can fix this issue with BIOS update.

There are also 2 new beta BIOS's : F15q and F15o but I had no time to test them.