I have installed Ubuntu GNOME 14.04 with gnome shell version 3.12.In log-in screen there is three options : "System Default","Gnome Classic" & "Gnome". When I select "Gnome" there is no problem & I can use it flawlessly but if I select "Gnome Classic" it boots into a gray screen with a mouse pointer and nothing happened.So how can I open the "Gnome Classic".
PS: Here how to troubleshoot the Gnome Classic Session? is the same problem as of me.But there is no answer.