Unity Gnome3 gnome-session-fallback or gnome-panel
Nada mas upgradear Ubuntu a la 12.04 desde la 10.04
sudo apt-get install gnome-session-fallback
«gnome-panel» is the package that allows for a graphical menu to be placed on the screen to perform various tasks, such as window management, placing various instant-view utilities (i.e. Network Manager), and placing launchers.
«gnome-session-fallback» is the package that enables a user to login and compute without using the famously productivity-killing Unity interface.