no prompt for password after resuming from suspend

[Martin Konôpka]

computer: HP ZBook 15 (1st generation, 2013)
OS: ubuntu-mate 16.04 (Xenial, 64 bit)

1.) The notebook power cable is plugged in.

2.) I close the notebook lid. OS goes to suspend state as it should.

3.) After some time I lift the lid and shortly press the power button. The OS wakes up without prompting for any password.

I think that in this situation user's password should by required for privacy and security reasons.

My screensaver setting is such that no password is required after termination of the screensaver session. (I do not like to type password every time the screensaver turn on. However, I wish to be prompted for my password when the system resumes from the suspend (or hibernation).

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: mate-power-manager 1.12.1-1
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: MATE
Date: Sat May 28 13:49:54 2016
InstallationDate: Installed on 2016-05-04 (23 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: mate-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Martin Wimpress  (flexiondotorg)]

I can't reproduce this issue.

[Launchpad Janitor (janitor)]

[Expired for mate-power-manager (Ubuntu) because there has been no activity for 60 days.]