[Bug 1733557] Re: Login screen showing Authentication Failure Switch to greeter...

[Rael Gugelmin Cunha]

A friendly reminder it affects 16.04 too (aside 18.04 and 18.10).

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Title:
  Login screen showing Authentication Failure Switch to greeter...

Status in unity package in Ubuntu:
  Fix Released

Bug description:
  When I lock my machine, the login screen shows my current user with
  the message: "Authentication Failure"

  ..and in the position when the password normally exists, the option
  "Switch to greeter..."

  This happens mostly after switching user sessions.
  Syslog contains entries like:
  Jan 6 17:15:42 eugene-Lenovo-Flex-2-14 compiz[1877]: WARN 2018-01-06 17:15:42 unity.lockscreen UserPromptView.cpp:500 Failed to start the authentication process. Retrying for 2 time.

  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: gnome-control-center 1:3.26.1-0ubuntu5
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.5
  Architecture: amd64
  CurrentDesktop: Unity:Unity7:ubuntu
  Date: Tue Nov 21 10:28:47 2017
  InstallationDate: Installed on 2017-04-17 (217 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-control-center
  UpgradeStatus: Upgraded to artful on 2017-10-23 (29 days ago)

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