Cannot lock screen?

[ikan]

Ctrl-alt-l doesn't work..
Selecting "Lock Screen" from the menu doesn't work too..
Just installed Ubuntu 12.10
Haven't done anything on it yet.

[ibjsb4]

Maybe

http://ubuntuforums.org/showthread.php?t=2074387

more here

http://www.googlubuntu.com/results/?cx=006238239194895611142%3Au-ocqbntw_o&cof=FORID%3A9&ie=UTF-8&q=lock+screen+12.10&as_qdr=all&sa=Google+Search&lang=en

[ikan]

Installed gnome screensaver already.
Haven't tried xscreensaver..