Update to #37 and #38 reporting the issue on 16.04 LTS: The issue went away as silently as it initially came. Ran another apt update/upgrade today, totally different packages updated and then rebooted. 'Authentication Failure' in the lock screen is now gone, even after several reboots.
For completeness here are the packages that updated, I don't see a comonality here.: Start-Date: 2018-03-14 21:25:36 Commandline: apt upgrade Requested-By: martin (1000) Install: linux-image-extra-4.13.0-37-generic:amd64 (4.13.0-37.42~16.04.1, automatic), linux-headers-4.13.0-37-generic:amd64 (4.13.0-37.42~16.04.1, automatic), linux-headers-4.13.0-37:amd64 (4.13.0-37.42~16.04.1, automatic), linux-image-4.13.0-37-generic:amd64 (4.13.0-37.42~16.04.1, automatic) Upgrade: unity-control-center-faces:amd64 (15.04.0+16.04.20170214-0ubuntu2, 15.04.0+16.04.20171130-0ubuntu1), linux-image-generic-hwe-16.04:amd64 (4.13.0.36.55, 4.13.0.37.56), linux-generic-hwe-16.04:amd64 (4.13.0.36.55, 4.13.0.37.56), unity-control-center:amd64 (15.04.0+16.04.20170214-0ubuntu2, 15.04.0+16.04.20171130-0ubuntu1), firefox-locale-en:amd64 (58.0.2+build1-0ubuntu0.16.04.1, 59.0+build5-0ubuntu0.16.04.1), libunity-control-center1:amd64 (15.04.0+16.04.20170214-0ubuntu2, 15.04.0+16.04.20171130-0ubuntu1), firefox:amd64 (58.0.2+build1-0ubuntu0.16.04.1, 59.0+build5-0ubuntu0.16.04.1), linux-headers-generic-hwe-16.04:amd64 (4.13.0.36.55, 4.13.0.37.56) End-Date: 2018-03-14 21:26:48 -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs