No Sound After installing Fedora 12

[Bart]

I have no sound at all after doing a clean install from live-cd of
Fedora 12 (I had Fedora 11 installed and no problems there). 

- I can see all the volume meters in pulse audio moving when I play for
instance an audio file in totem. So I think this is not a pulseaudio
problem.

- su -c "alsaunmute -c 0" gives me:
Unknown hardware: "HDA-Intel" "Realtek ALC861"
"HDA:10573055,10573055,00100700 HDA:10ec0861,15840000,00100300" "0x1734"
"0x10c7"
Hardware is initialized using a guess method

- uname -r   
  2.6.32.9-70.fc12.i686

- /usr/bin/alsa-info.sh
http://www.alsa-project.org/db/?f=9dd99fe22f231e120e75215617b38c2b476370ab