Reading package lists...
Building dependency tree...
Reading state information...
The following packages have been kept back:
  gir1.2-unity-3.0 libcanberra-gtk0 libcanberra-gtk3-0 libcanberra-gtk3-module
  libpulse-browse0 libpulse-mainloop-glib0 libpulse0 linux-generic
  linux-headers-generic linux-image-generic mozilla-plugin-vlc nvidia-common
  pulseaudio pulseaudio-esound-compat pulseaudio-module-bluetooth
  pulseaudio-module-gconf pulseaudio-module-x11 pulseaudio-utils vlc vlc-nox
  vlc-plugin-notify vlc-plugin-pulse
0 upgraded, 0 newly installed, 0 to remove and 22 not upgraded.