visuallogin is a configuration flag (set using chkconfig) that provides Login service on a graphical console. Pictures can be provided on the login screen for each account. The process is described in the Add Pictures to Visual Login wiki entry.
If you turn this off and leave windowmanager on you will get a Xdm login screen.
Leave chkconfig'd on unless you are a fan of XDM.
Add Pictures to Visual Login
Use chkconfig to make sure that visuallogin is set to on and noiconlogin to off. The icons (SGI RGB format, at least 100x100 pixels) can be placed in the following locations:
/$HOME/.icons/login.icon /usr/lib/faces/$USER /usr/local/lib/faces/$USER
$USER is the loginname of the user, $HOME the home directory.
Remember, no file extension is needed after the name of the image. $USER is not a directory, but an actual rgb image file with the name of the account that it will use during visual login.
Courtesy of Gerhard Lenerz.
Visual Login Banner
You can display a banner instead of user account icons by
chkconfig visuallogin on chkconfig noiconlogin on
and replacing the stand SGI (RGB) image in /usr/Cadmin/images/cloginlogo.rgb an image of your choice. See the man page for clogin(1) for more details.
- man visuallogin