Currently when I login I do not have to provide a login password. I simply click on my user name and I get in. I would like to change that. In order to accomplish that I went to settings >> users  and then in Login options there was no password set next to the Password label. So I clicked on it and was prompted to enter my old password and new password. However after entering my new password the change button is still disabled. How can I enable that change button so that I could login using my password.
setting up a startup login password Fedora 20
fedora;login manager
Have you tried passwd from the command prompt?