I disagree that this bug is greeter related (even if you set your new password, you haven't told greeter to use it to login, but there is still the option chosen to log in without one).
What this does, which is more serious for the new user, it's that it disables the admin password and effectively locks you out of any maintenance activities. The logical way would be to inform PAM that this account may be used to log in without password, but leave the user password otherwise intact so sudo can still make use of it so the user still has access to elevated rights when needed. My two cents for this old bug, because I think it still affects the current distribution too, though I can't test it at the moment. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1070449 Title: "Login without password" option effectively locks super user out! Status in “gnome-control-center” package in Ubuntu: Confirmed Bug description: I installed Ubuntu 12.10 with the option to log my main user with a password. Then I added two other users and changed all three accounts to log in without a password. This nulled my main user's password and stopped the ability to sudo and make any system wide changes! Also the password can not be set back on, as there is no valid password to authorize any actions! In effect, you are completely left without a super user for your computer and cannot install updates or programs or do a whole lot of anything. There is a remedy to this and it is to go to the terminal and typing passwd, after which you can re-set your password. However this is not clear to many users, and that's why the Users panel simply should not be able to null your password even if you prefer to login without one. Very critical to get fixed asap! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1070449/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp