I've experienced the same problem on a fully patched 16.04 LTS. This issue only occurred in the last few weeks & may have corresponded to when I added 3 new users to the machine. I have previously used the first option in https://askubuntu.com/questions/859581/how-to-change-the-unity-lockscreen-wallpaper to modify my lock screen wallpaper. After this recent "Authentication failure" issue occurred I recompiled the Greeter Schema as per the link above (sudo glib-compile-schemas /usr/share/glib-2.0/schemas) which has cured the problem on my machine at least.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1733557 Title: Login screen showing Authentication Failure Switch to greeter... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1733557/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
