Running Fedora 17 with Gnome 3.x. I normally don't use the lock desktop feature, but the one time that I did recently, I was unable to shutdown the system. A dialog box popped up stating that there were others still logged into the system, therefore requiring me to enter root's password to proceed with the shutdown. For the most part this happens everytime that I want to powerdown, with the exception of a couple of times.
I have in the past cancelled out from the dialogue which will log me out. I then switched to another virtual console (Ctrl-Alt-F3), logged in as root and did a "who". I received back:
unknown :0 date-time (:0)
root tty3 date-time
Logged out of tty3 and went back to the log-in screen, clicked on the power icon at top right and selected the powerdown option, getting the same result. Cancel out again and then logged back in. Open a terminal (I use terminator) and again type "who" and got: scott :0 date-time (:0)
scott pts/0 date-time (:0)
I closed out the terminal (Ctrl-d) and again tried to powerdown. Sometimes it'll just powerdown, but mostly it'll pop up the dialog box asking for root's password.
Is there something else that I can use to determine what is happening? I normally do not have remote access enabled or tcp port 25 open, so I don't know what else to check. Even if they were turned on, wouldn't "who" show something if someone was in that way?