security screen lock not active

[zoltanderi]

Occasionally, the computer is not locked upon screen wake-up, and/or after suspend wake-up. All corresponding security settings are checked.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity-control-center 15.04.0+16.04.20170214-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-96.119-generic 4.4.83
Uname: Linux 4.4.0-96-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Oct 2 17:39:44 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-06-08 (481 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity-control-center
UpgradeStatus: No upgrade log present (probably fresh install)