I'm running Redhat 5.6 with the gnome display manager. I would like to configure the login manager so that there is no echo of the password when typing it in (no asterisks or the like). I have edited the files /usr/share/gdm/defaults.conf and /usr/share/gdm/factory-defaults.conf and changed the line
#UseInvisibleInEntry=false
to
UseInvisibleInEntry=true,
but I still get a password echo of asterisks at the login screen.