Comment 107 for bug 301755

Ok, it seems Iiriko's workaround worked for my X-Fi. The only thing I had to do before reinstalling pulseaudio and applying the fixes was removing pulse folders:

sudo rm -rf /etc/pulse
sudo rm -rf ~/.pulse

The only trouble I have after this is sound in Skype...

$ apt-cache policy pulseaudio:
pulseaudio:
  Installato: 1:0.9.15-1ubuntu2~ppa1
  Candidato: 1:0.9.15-1ubuntu2~ppa1
  Tabella versione:
 *** 1:0.9.15-1ubuntu2~ppa1 0
        500 http://ppa.launchpad.net jaunty/main Packages
        100 /var/lib/dpkg/status
     1:0.9.14-0ubuntu20.1 0
        500 http://it.archive.ubuntu.com jaunty-proposed/main Packages
     1:0.9.14-0ubuntu20 0
        500 http://it.archive.ubuntu.com jaunty/main Packages