It's not like others I've seen here so I opened a new question. It does toggle to the HDMI channel, but this outputs through my laptop's speakers when testing in the sound menu.
I've looked in the
NVidia X server settings but I don't see anything regarding sound settings. Does this mean that the Ubuntu graphics driver doesn't support it?
When booted In win7 this works right away.
on Ubuntu 12.04 with all updates as of now.