I have an ALC888 on my machine and it works just fine for me on Intrepid and Hardy, I didn't have to do anything. I also have an ati hdmi device on my gpu like you do.
That message means that pulseaudio has crashed which is weird becase the pavucontrol should have given you an unable to connect error when you opened it.
Did you reboot after folowing the guide?
That is sometimes necessary but not always which is also sort of weird.
What is your machine?