No Sound over HDMI - Geforce 210

[LinuxUser531700]

Downloaded and ran 5.25 this evening. Installed current Nvidia drivers.
When I run aplay -l, no sound cards appear.
When I run cat /proc/asound/cards, I get:

Hda-Intel -HDA Nvidia
HDA Nvidia at 0xfc7c000 irq 18

Shows as card 0

When run alsamixer in a terminal, the HDA Nvidia information appears, but in the middle of the terminal it says 'This sound device does not have any control'

When I right click on the volume applet in the tray, the box that opens is empty.

In Ubuntu 10.04 & 10.10, it was tricky, but I was able to get the sound working. The same things I did in Ubuntu aren't working here.

Any ideas? Do I need to post anymore information?

[theoreo25]

go to your computer's alsa mixer (by entering "alsamixer" in a console window), should be under the mulltimedia tab in the menu labeled as "mixer generic sound mixer" then hit f6 then select the card that says hdmi next to it.

[Flash]

When I choose the HDMI option from alsamixer's F6 menu, the alsamixer window shows S/PDIF with a little box above it that has MM in it. I have to hit the M key to toggle MM (mute) to 00, or perhaps oo, which I presume means "ON". I don't have a noisemaker with an HDMI input handy to test it with.