I recently upgraded my ubuntu 11.10 to 12.04. The upgrade happened successfully. Now, on login screen, i cant do any thing except entering password. Mouse pointer doesnt move and i cant select any option for login.
Anyhow, once i am login, desktop seems freezing and no any icon is active. No mouse movement. The only thing which i can do is Ctrl-Alt_del. And again the same problem.
Could some please help me out