x@x-desktop:~$ apt-cache policy pulseaudio
pulseaudio:
  Installiert: 1:1.1-0ubuntu15.1
  Kandidat:    1:1.1-0ubuntu15.1
  Versionstabelle:
 *** 1:1.1-0ubuntu15.1 0
        500 http://de.archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1:1.1-0ubuntu15 0
        500 http://de.archive.ubuntu.com/ubuntu/ precise/main i386 Packages