Comment 62 for bug 1169761

Finally it is working with no need to nstall a new Kernal, what you need to do is simply download and install the lates version of this audio Package: oem-audio-hda

1- Download & Install this Package: https://code.launchpad.net/~ubuntu-audio-dev/+archive/alsa-daily/+packages, then Reboot
2- Go to "Sound Settings", you should now see your hdmi device listed, select it and your done.

Thats about it, Enjoy your day (: