Comment 103 for bug 198453

No package provides /etc/asound.conf - just stick that in the pulseaudio package.

As for the Kubuntu / Xubuntu conflict, that's really not a valid argument. The technical issue of properly configuring for pulse only when pulse is installed seems trivial, and - in any case - the usability of Ubuntu should trump the logistical convenience of shared repositories if a solution can't be found.