I've been playing with all sorts of things today trying to get this working. I even formatted the partition and installed a brand new version of Kubuntu 11.10, just to see what would happen. It picked up the extra channels ok, but still needed the latest nvidia driver to get sound working over hdmi. With my minor success I then gave the linuxmce installer a go, but it really didn't like that kernel!! After about 6 hours of fiddling, trying to get it happy, I gave up and went back to 10.04. I'm now at the stage where I have hdmi audio working in the kde desktop again. I installed the latest alsa drivers, and the Nvidia driver. After a bit of fiddling with the multimedia settings, it works every time. I can play music from Amarok, and even the startup jingle plays when the machine boots into KDE.
Anyway I'm now in the process of running the mce-install.sh script again on this fresh install to see how it goes. I checked the output of amixer scontrols, and its no different to before, when it didn't work, so no help there. I'd be happy to provide any information to anyone who might be able to see whats different now its working. I'll report back once mce is up and running, with the result of this installation.
**Could anybody tell me how to archive the mce installation files locally, i.e. on a different partition of this machine, or on my nas? I must have downloaded the complete installation at least 20 times in the last week, and it seems a waste of time to keep downloading the same set of files. Thanks.**
look into apt-mirror, thats what i used when i was testing, if you need additional help feel free to pm me