HDMI audio on AMD/ATI GPUs has been disabled by default, see http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-oneiric.git;a=commit;h=805c22168da76a65c978017d0fe0d59cd048e995 for details.
If you want to try enabling HDMI audio, add radeon.audio=1 to your GRUB boot command line.
HDMI audio on AMD/ATI GPUs has been disabled by default, see http:// kernel. ubuntu. com/git? p=ubuntu/ ubuntu- oneiric. git;a=commit; h=805c22168da76 a65c978017d0fe0 d59cd048e995 for details.
If you want to try enabling HDMI audio, add radeon.audio=1 to your GRUB boot command line.