I’m really enjoying the latest additions in GNOME 2.28, but one thing that has been bugging me is the rewrite of the GDM login screen. Historically it has been possible to customize a number of options, including features such as activating or deactivating the user list. With this latest upgrade it seems that GDM has been completely rewritten and those previously accessible customizations are now gone or well hidden. I have, however, been able to find a way to disable the user list and, again, require a username to login.
I’m curious to see further improvements to the new GDM system, but until that time I prefer to require username and password to login, not just a password.
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