Samuel M. Goldwasser wrote:

Is there an entry for 'Microsoft UAA Bus Driver for High Definition Audio'?

Yes, but it seems to predate the latest version.

Microsoft UAA Bus Driver for High Definition Audio
3/5/2004
5.10.0.5010


There *may* be a fix regarding something that installing service pack3
did (or didn't do), or it could indeed be something broken on the chipset.

Even if you boot from a linux boot CD (or install windows 7) and find
the sound working with that, I'd spring for a cheapie $7 soundcard -
it's not worth spending time if other more $$$ things are being
displaced from your interest.

IMO There are only a few onboard chipsets that are good in quality - the
rest, including realtek, tend to be rather noisy.

--
Adrian C