Did anyone use kernel 3.4? I've given it a try but got into problem that I loss HDMI audio in kernel 3.4.

3.3.7 works fine. In kernel 3.4, the HDMI audio device is correctly found. But no sound is coming out (I've tried aplay with correct device number, try to unmute and all didn't work).

Heard that 3.4 give a performance boost for radeon driver, however, I can't use it unless HDMI audio is also working.