After successfully installing Xubuntu 12.04.1 on my laptop, I decided to install Unity. That went OK but then I realized there was no themes. So then I installed the themes and artwork, and got a really bad surprise. My lightDM greeter was still Xubuntu like I wanted but the buttons where you choose the user are really tall and I have a purple computer as the icon above my computer name. How do I get back to the original Xubuntu configuration or edit the CSS while keeping Unity? I know where all of the files are but don't know which file to edit or which CSS property to modify.

Packages Installed:

unity unity-services unity-mail

Then I Installed:

ubuntu-artwork light-themes ubuntu-wallpapers-oneric ubuntu-wallpapers-precise

Check the content of /etc/lightdm/lightdm.conf. To get back to the Xubuntu config, make sure the greeter-session parameter is set to 'lightdm-gtk-greeter', ...like this:


To edit the file, run gksu leafpad /etc/lightdm/lightdm.conf.

  • No thats not it. It's properly set. Is there a CSS option. – Christopher Oct 3 '12 at 3:24
  • There might be, but I don't know. :) – mikewhatever Oct 3 '12 at 4:24
  • 2
    This fixed a different thing for me, it fixed the known "System running in low graphics mode", after switching from Unity to Xubuntu. – Marcel Valdez Orozco Oct 6 '12 at 17:51
  • Ah yes indeed, Xubuntu uses the gtk-greater. – mikewhatever Oct 6 '12 at 18:06
  • @MarcelValdezOrozco how do you fix "System running in low graphics mode"? – Christopher Oct 6 '12 at 19:52

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