I can confirm that this bug exists as I am experiencing it with a Gigabyte GA-Z77X-UD5H, 3770K processor and Ubuntu 12.04 64-bit desktop edition. I have not tried the gray socket for audio output, but HDMI audio works fine. The green socket also works just fine in Windows.
I can confirm that this bug exists as I am experiencing it with a Gigabyte GA-Z77X-UD5H, 3770K processor and Ubuntu 12.04 64-bit desktop edition. I have not tried the gray socket for audio output, but HDMI audio works fine. The green socket also works just fine in Windows.