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 

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:    
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.

  Login screen showing Authentication Failure Switch to greeter...

To manage notifications about this bug go to:

ubuntu-bugs mailing list

Reply via email to