Every time I log out, and change session, select Unity2D and login Ubuntu is loaded, to what it seems to be in Unity3D. When I check in the terminal, that is confirmed.
I even changed the default to Unity2d, via one of the config files, but still, no joy.
It always is just Unity3D - even when I select GNOME Shell (I downloaded GNOME Shell from the software manager).
Any ideas on why Unity3D is loading instead of other desktop sessions?