The setup utility that comes in Ubuntu Karmic (and many other Gnome based distros) is missing most of the older GDM setup utility’s functionality. This application puts the functionality back in the hands of the users through a familiar and simple GUI Like the one shown below. This GDM setup utility’s functionality brings back the old gnome desktop functionaly from previous versions of Ubuntu (Karmic Koala 10). This utility allows users to change the login wallpaper, theme the login, use prompted or userlist login, etc. To add this app into your package manager, execute the following commands from a terminal window:
sudo add-apt-repository ppa:gdm2setup/gdm2setup
The above command automatically enables PPA repository in the apt-sources list
sudo apt-get update
sudo apt-get install python-gdm2setup
The application will now update along with your other packages automatically and will appear in your System / Administration menu as “Login (GDM2Setup)”.