Tuesday, May 11, 2010

To change the GDM login background in Ubuntu Karmic Koala

I found to my utter consternation that one cannot change the login background in Ubuntu Karmic Koala (or Linux Mint 8, for that matter) from gdmsetup.

I found this solution after a bit of googling -
  1. Firstly, we log out of the current session and return to the GDM login screen.
  2. At this point, pressing Ctrl-Alt-F1 throws up the terminal.
  3. Login to this terminal with your username and password.
  4. Then issue the following command -
    $export DISPLAY=:0.0
  5. followed by -
    $sudo -u gdm gnome-control-center.
  6. At this point, pressing Alt-F7 brings us back to the GDM login screen with gnome-control-center
  7. Selecting Appearance from gnome-control-center and making the appropriate changes to the background, font.
  8. Closing the gnome-control-center window reveals the login screen with the new background.

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