Hello Linux Geeksters. In this article I will show you the easiest method for disabling the screen lock dialog on Ubuntu 13.10 Saucy Salamander, Ubuntu 13.04 Raring Ringtail, Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin and Ubuntu 10.04 Lucid Lynx.
If you find it annoying that you need to type in your password, after your system was idle some minutes, you can easily disable it.
Disabling the screen lock may create security issues, since anybody can use your user, if you are afk (away from keyboard : D) and leave the computer idle.
To disable the screen lock, just open a terminal and type:
$ gsettings set org.gnome.desktop.screensaver lock-enabled false