Running Ubuntu 11.10 (upgraded from 11.04) 64-bit on Intel Core i7 2600 (SandyBridge). I am not using the integrated graphics but using ATI Radeon HD 5450. Random freezes occurring while trying to unlock from locked screen. Initially could use Ctrl+Alt+F1 to get a console. Tried to kill my previous session using skill -KILL . Got back the login screen after this. But when I tried to login, entire system just froze. Couldn't even open the console with Ctrl+Alt+F1.
Running Ubuntu 11.10 (upgraded from 11.04) 64-bit on Intel Core i7 2600 (SandyBridge). I am not using the integrated graphics but using ATI Radeon HD 5450. Random freezes occurring while trying to unlock from locked screen. Initially could use Ctrl+Alt+F1 to get a console. Tried to kill my previous session using skill -KILL . Got back the login screen after this. But when I tried to login, entire system just froze. Couldn't even open the console with Ctrl+Alt+F1.