You can remove the dots from the login screen in 12.04-13.10 using this method.

How do you remove the dots from the new lock screen in Ubuntu 14.04?


Manually went into dconf-editor and went to com.canonical.unity.unity-greeter and unchecked the option draw-grid. For some reason, this worked and not the command line answer from before, which I also tried. Hope this helps.

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    It is because the login screen settings are those of user lightdm, but lock screen settings belong to the actual user. A commandline solution would be gsettings set com.canonical.unity-greeter draw-grid false (without the preceding two lines) – S Prasanth Apr 25 '14 at 1:22
  • Works like a charm. @EdPaton-Williams: If it worked for you, please consider marking it as an accepted answer by clicking the checkmark to the left. – Jez W Jul 8 '14 at 12:06
  • This worked, but first you must install dconf-editor: sudo apt-get install dconf-tools askubuntu.com/questions/22313/… – wordsforthewise Aug 5 '17 at 3:23

To remove white dots, run the following commands in a Terminal:

sudo xhost +SI:localuser:lightdm
sudo su lightdm -s /bin/bash
gsettings set com.canonical.unity-greeter draw-grid false;exit

Source: http://www.noobslab.com/2014/04/thingstweaks-to-do-after-install-of.html

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    Thanks for that. I don't have my Ubuntu machine in front of me but I'm almost certain that is only for the login screen. I tried this method already and the dots are still there for the new lockscreen. – Ed Paton-Williams Apr 22 '14 at 16:08
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    I ran just this line and it worked: gsettings set com.canonical.unity-greeter draw-grid false I don't know what the other lines are supposed to do. – DavidW Oct 16 '15 at 15:43
  • Didn't work for lock screen on ubuntu 16.0.2 – wordsforthewise Aug 5 '17 at 3:23

Just adding this answer (sourced from comments) for easier view. This worked for me on 14.04 LTS for lock screen. Thanks to S Prasanth for the answer

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

To do the same for login screen, one has to become do it as the lightdm user. Which can be done by the method described by @Fat Mind

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