Comment 8 for bug 427067

Figured out a way to make those gconf settings work, but still no way to set user list. The command to use is the following:

gksudo -u gdm dbus-launch gconf-editor

For some reason, I had to launch it twice, making the change to remove the user list each time, before it "remembered" the change. This might be related to using "close window" when closing gconf, instead of exit, but I'm not sure.

Anyway, log out and you will see that there is no longer a user list (but you still have to click on "log in as another user" to enter your user name and password).

Regarding adding users to the user list, the gdm manual (http://library.gnome.org/admin/gdm/2.28/gdm.html) implies that you can. The key is supposed to be: /apps/gdm/simple-greeter/include (string list). But this key does not exist, and adding it manually does not work (mentions that they key "has no schema"). It is also not listed in the default schema (/usr/share/gconf/gdm-simple-greeter.schemas).

In any case, enjoy.