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No HDMI sound after upgrade to Kubuntu 11.10 with my hd4770
but I can't play back audio. When I try, the audio software plays back at incredible speed and no sound is there. mplayer, vlc, audacity, paplay, aplay, speaker-test all show the same behavior.
pavucontrol however indicates a level change in the audio volume.
My card is an Evergreen model and http://www.x.org/wiki/RadeonFeature indicates that HDMI audio is not supported for them. Although shouldn't lspci not be able to see it then?
No, lspci devices always appear regardless of the driver used. The HDMI audio is just detected as a seperate chip, which also needs a driver to be loaded. It seems like Juniper HDMI Audio is not yet supported by snd-hda-intel.