For those who don’t favor the unity desktop, u can get back the old classic gnome desktop. This applied to both Ubuntu 12.04 or 13.04.
Open terminal and run below command to install the classic gnome desktop:
sudo apt-get install gnome-session-fallback
Once finish, you need to logout from the existing session.Once you are at logon screen click the option to change your session then choose Gnome Classic to logon.
Your classic gnome is back~~~