by default, the root account is hidden from the user list displayed by the graphical greeter (gdm) in EL 6.2. Yesterday I wanted to restart the X server, so I logged in to a text console (CTRL-ALT-F2) as root and initiated an init 3 > init 5 cycle. When X came up again, I found a root entry in gdm! But even after logging out of the root account and rebooting, this entry is still present. It seems that gdm somehow "remembers" that the root account has been used - nota bene: on a text console, not in graphical mode!
Any ideas how to get back to the default behaviour?
As a workaround I could hide the root entry explicitly by putting an "Exclude" statement in /etc/gdm/custom.conf but I would prefer to know (and eliminate) the real cause of the problem
Thanks in advance