I'm wondering how I would go about changing the default logon screen (just the background) in Ubuntu 12.04. I can't seem to figure it out.

  • 1
    The default lightdm background is set the same as your desktop background, as long as the background file is under /usr/share/background Do you want to set a different background than your desktop? – João André Jul 29 '13 at 19:37
  • its not being set to my desktop background and the desktop background is in /usr/share/background – swiftimundo Jul 29 '13 at 19:59

A solution I found to work is to replace the default background being used by lightdm:

> sudo cp /path/to/image.png /usr/share/backgrounds
> cd /usr/share/backgrounds
> sudo mv warty-final-ubuntu.png warty-final-ubuntu.png.old
> sudo mv image.png warty-final-ubuntu.png

This, however, is just a workaround and probably not the best solution. It is just the most direct way to do it assuming you don't need the default Ubuntu wallpaper.

EDIT: Also make sure that you set your image to have the same owner and permissions as the original warty-final-ubuntu.png (root,755),

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