This is about the original bug; related to PulseAudio. Kevin Kofler has
developed a patch that allows Audacity to use non-mmap devices, such as
Pulseaudio, as its backend. I've tested this patch, adjusted it
slightly, and packaged it for Ubuntu 8.10.

If you like to try it, the simplest way is to install the patched version from 
my ppa: 
https://launchpad.net/~diwic/+archive
If you'll prefer building it yourself, use the patch attached to this message 
(the file should be put in debian/patches subdirectory).

Notes about this patch:
- If the device "Alsa: pulse" was not there before (under Edit->preferences), 
it should be there now (for both playback and recording).
- If playback stutters, try to increase the latency and see if that helps.
- Disclaimer: This is not an official Ubuntu patch (yet!), and it has not been 
widely tested. If it does not work; blame me, not Ubuntu. ;-)


** Attachment added: "portaudio_nonmmap.patch"
   http://launchpadlibrarian.net/20277233/portaudio_nonmmap.patch

-- 
Audacity does not mesh with PulseAudio
https://bugs.launchpad.net/bugs/178895
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