I myself am not a big fan of the white dots shown on the login screen. If you’re just like me and want to remove the white dots…. here is how you do it.
Open a terminal window (press Ctrl+Alt+T) and copy+paste the following lines:
sudo xhost +SI:localuser:lightdm
sudo su lightdm -s /bin/bash
gsettings set com.canonical.unity-greeter draw-grid false
When done close the terminal window and the white dots are removed from the login window.
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