Can't unlock screen after manual locking

[Jane Atkinson]

Testing in Virtualbox VM, Xubuntu 17.04 amd-64

I locked the screen using the lock button at the bottom of the whisker menu.

On attempting to unlock, the screen goes black for a split second, then comes straight back to the password dialogue. I tried several times, with the same result. I needed to shutdown/reboot to get out of the loop.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: light-locker 1.7.0-2ubuntu1
ProcVersionSignature: Ubuntu 4.9.0-15.16-generic 4.9.5
Uname: Linux 4.9.0-15-generic x86_64
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Sat Feb 18 17:01:14 2017
InstallationDate: Installed on 2017-02-18 (0 days ago)
InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20170218)
ProcEnviron:
 LANGUAGE=en_NZ:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_NZ.UTF-8
 SHELL=/bin/bash
SourcePackage: light-locker
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1665838