Same issue in my laptop Lenovo G40-80 I think after some apt-get update/upgrade it has started. (Between 2 or 3 weeks ago)
I'm the only user of this computer. There is only my user and admin is disabled. I use Virtual Box and it was upgraded recently to Version 5.1.34 r121010 (Qt5.5.1). If I lock screen it don't happens immediately. It happens only after screen goes blank. Then I have to click on "switch to greeter" in password field and wait some seconds to screen changes and I be able to insert password. # lsb_release -a LSB Version: core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:printing-9.20160110ubuntu0.2-amd64:printing-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch Distributor ID: Ubuntu Description: Ubuntu 16.04.4 LTS Release: 16.04 Codename: xenial -- 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
