sudo apt-get install gnome-session-fallback
sudo /usr/lib/lightdm/lightdm-set-defaults -s gnome-classic
tapi kalo kalian sih mungkin lebih suka gnome 3 ya
sudo apt-get install gnome-shell
sudo /usr/lib/lightdm/lightdm-set-defaults -s gnome-shell
terserah deh kalo tetep pengen balik ke unity
sudo /usr/lib/lightdm/lightdm-set-defaults -s ubuntu
