In Fedora 10 root login is disabled in the gdm welcome screen. In many situations we want to login as root.
So change this.
1. Login as an ordinary User into fedora 10
(password for root user)
For Security reasons First Create a backup of the file
cp -a /etc/pam.d/gdm /etc/pam.d/gdm.orig
then open the file
find the line
auth required pam_succeed_if.so user != root quiet
then change the line to
auth required pam_succeed_if.so user quiet
the you can login as root in gdm