Remove The User List From Ubuntu 9.10 GDM Login Screen

Disable User List

In order to disable the user list you’ll need to open a terminal and run the following command:

sudo -u gdm gconftool-2 --set --type boolean /apps/gdm/simple-greeter/disable_user_list true

Enable User List

If you’d like to re-enable the user list you can revert the above command using:

sudo -u gdm gconftool-2 --set --type boolean /apps/gdm/simple-greeter/disable_user_list false