I experience a Bug where the login screen doesn't work correctly after I closed the laptop lid. When i open it again the login screen appears and I can move the cursor but I cannot click anything or enter something via the keyboard. The only thing I can do is killing it and restart -> then everything works normally. The bug does not appear when I logout without closing the lid. But if I log out and close it afterwards the same problem appears.
I use a Sony Vaio with an Nvidia Geforce and an Intel i5.