I'm using ubuntu 14.04, here in the 'login screen' the password field is disabled, this issue also occurs sometimes during 'lock screen'. I don't want to remove password from my account nor do i want auto login. My account is with administrator privileges.
Going to terminal using Control + Alt + F1, then back to GUI with Control + Alt + F7, doesn't enables the password field.
Best Answer
I'm having the exact same issue. Edit: Looks like this is a confirmed bug: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1311316