Public bug reported:

Using kernel 2.6.27-7 on 8.10, sound is output in a stuttering, choppy, way, as 
if each moment of sound is followed by about an equal moment of silence. 
Sometimes the login sound is played correctly on first boot, but the problem 
begins if I try to play any sound. Happens with every sound source - mp3, ogg, 
audio CDs.

This doesn't happen with kernel 2.6.24-16-generic (i.e. I can boot with
the old kernel and sound works correctly)

The machine is a Toshiba Equium. This install began at Gutsy, and was
upgraded to Hardy and then Intrepid. Previously (separate install on the
same machine), I had a slightly similar problem in the distant past
(maybe broken in Dapper, fixed in Edgy or Feisty?).

The only possibly-relevant change I can recall making is setting up
ath5k drivers (as suggested in the 8.10 release notes).

attaching output, for both versions, of:
 lscpci -vv
 cat /proc/asound/cards
 cat /proc/interrupts (note the new rad...@pci entry on 17)

With old kernel (working):
http://www.alsa-project.org/db/?f=238a19b43625de535ee64d25cb9698079f47c1e6

With new kernel (not working):
http://www.alsa-project.org/db/?f=ad1c361ddee7b0e4f33803390e1122512d6325e9

** Affects: ubuntu
     Importance: Undecided
         Status: New

-- 
ATI IXP AC97: sound regression between 2.6.24-16 and 2.6.27-11 kernels
https://bugs.launchpad.net/bugs/327993
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