I am using ubuntu 11.10 and recently installed Gnome Shell over the Unity interface. Gnome was taken from the ubuntu software center. Now, once logged into Gnome Shell, i am unable to logout from it when required. As in, when i select logout from the desktop, it shows a dark grey screen after 2 seconds and then this screen persists till eternity. No matter what key or action i do during this time, the screen persists, and i m forced to hard boot again.
i did not face any issue during logging out from the Unity. this is only with the gnome3 DE. since i am new to Ubuntu, i m finding it hard to resolve on my own.
please let me know where to check, and what to correct, to resolve this logout issue.