I also have no sound on an ASROCK motherboard K8NF6G-VSTA (with AMD
Sempron 2800) with Feisty.  Amarok is pretending to be playing happily,
but no sound comes out. I also did a trial with Gutsy tribe 5 from Live
CD, but it gave no better result. My original bug report had been closed
although there had never been a solution.

Sound was working on some earlier kernels (I believe e.g. with 2.6.10 or
nearby), which, however, had problems that sound was lost after suspend
and/or hibernate.

I have found a workaround which solves some of those problems (although
I have no clue why it does; I simply took hints from some of the many
sound related bug reports)

Status now:
- Sound working reliably (loudspeaker, headphone, mic front and mic back)
- Hibernate : working well. Sound even continues to play where it was at point 
of hibernate. (But strange things on screen while resuming from hibernate).
- Suspend: sound comes back ok as with hibernate, but screen remains black. 
Screen's LEDs indicate that there is not even a video signal. And even blind 
login does not give screen back.

Here are the findings of the system:
Sound module:  snd-hda-intel
lspci -vvv reports the very same audio device as in this bug report - "nVidia 
Corporation MCP51 High Definition Audio (rev a2)"- , with subsystem "ASRock 
Incorporation Unknown device 03f2". 
aplay --list-devices reports:   "card 0: NVidia [HDA NVidia], device 0: 
ALC861VD Analog [ALC861VD Analog]"

Either one of these lines need to be inserted into /etc/modprobe.d/alsa-base:
(they all seem to work indentically; no discernable difference to me)
options snd-hda-intel model=3stack                             
options snd-hda-intel model=3stack probe_mask=1   
options snd-hda-intel model=clevo  
options snd-hda-intel model=laptop                             

This line gave NO sound, but hibernate and suspend worked as with the above 
lines:
options snd-hda-intel model=auto

-- 
Not work Audio device: "nVidia Corporation MCP51 High Definition Audio (rev a2)"
https://bugs.launchpad.net/bugs/117246
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