This simple tutorial is going to show you how to remove the white dots in LightDM login screen in Ubuntu 12.10.

If you have already installed the Ubuntu Tweak, navigate to Tweaks -> Login Settings -> unlock -> turn off draw grid.

Alternatively, hit Ctrl+Alt+T, copy and paste following commands into terminal and run one by one.

  • Allow user lightdm to create a connection to the X server:

    sudo xhost +SI:localuser:lightdm

  • Switch to user lightdm:

    sudo su lightdm -s /bin/bash

  • Disable draw grid in unity greeter:

    gsettings set com.canonical.unity-greeter draw-grid false

That’s it!