I just installed Ubuntu 14.04 and want to have GNOME working instead of Unity, I simply typed to console:
sudo apt-get install gnome-shell -y
Some required packages were installed and
gdm was along them.
I made gdm be the default against lightdm.
However, when I log in I can't really pick GNOME as desktop enviroment at start login screen. There's Ubuntu and System Default.
Ubuntu actually is Unity and when I pick System Default it'll login but anything will be loaded but the wallpaper, not any superior or inferior bar, not any effects.
Just for the record, I tried with lightdm but it won't show any option for choosing a desktop enviroment.
How can I have GNOME (at least 3.10) working properly on my Ubuntu?