I have an acer aspir aspire r3610 and right now I use the spdif out, which works, but I want to use HDMI, because of other things that run through the TV. After that via SPDIF out to my receiver.

On Mon, Jan 24, 2011 at 10:11 AM, Xavier Bestel <xavier.bestel@free.fr> wrote:
On Mon, 2011-01-24 at 09:59 -0500, Cr0t daywalker wrote:
> Right now I am using SPDIF, which works great, but I want to switch
> over to HDMI and then run SPDIF from the TV to my receiver. Does linux
> only support stereo out over HDMI?

I did my homework (at last). Follow the thread named "ALSA multichannel
through HDMI" and you'll see it's only stereo for Radeon cards. Note
that 5.1 passthrough should still work OK.
I don't know about other HDMI chips.
Takashi apparently wanted to ping someone at AMD. I hope it'll result in
something sooner than later.