I have installed Gnome3 from the Gnome3 PPA and after restart NO window interface is appearing. I have installed LXDE, Gnome Classic and Unity 2D. When I've installed Gnome3 I was in the Unity 2D session and I think that this has been broken and now doesn't let me to login. After boot I enter in safe mode and from the console I want to change the log in environment to LXDE and after that to give Logout and choose Gnome3. How can I enter in LXDE (or directly in Gnome3) from console/terminal?
Btw gdm start gives me an error!