The issue is not a lightdm one if the user is still is the nopasswdlogin group, can't reproduce it on a xenial installation though. When you set the new password the change stick to the UI, it reflects after validating that a password has been set? Doing those steps on a test install the user is removed from the group when the new password is set...
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1630156 Title: No password needed to Log in after cancel the password and then reset again Status in Light Display Manager: New Status in OEM Priority Project: Confirmed Status in OEM Priority Project trusty series: Confirmed Status in lightdm package in Ubuntu: Confirmed Bug description: OS: 14.04 trusty Tested with 16.10 lightdm version is 1.19.5 issue still exist 1. Go to path "System Setting --> User Accounts--> Unlock" to unlock system setting. 2. Click "Password --> Action --> Log in without password -->Change to clear Log in password. 3. Reboot and log to desktop without password. 4. Then do the similar action "Set a password now" as the same way to set Log in password. 5. Reboot but still no password needed at Log in interface. To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1630156/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
