Suspend on lid close broken

[Alf HP Lund]

See also
https://bugs.launchpad.net/ubuntu/+bug/44058
https://bugs.launchpad.net/ubuntu/+source/upower/+bug/863834
https://bugs.launchpad.net/ubuntu/+source/upower/+bug/854404

Toshiba Satellite P850, Ubuntu Studio 16.04

In 'Power Manager', 'when laptop lid is closed' is set to 'suspend'
In /etc/systemd/logind.conf, 'HandleLidSwitch=suspend' and 'HandleLidSwitchDocked=suspend'
In /etc/UPower/UPower.conf, 'IgnoreLid=false'

Even so, the laptop does not suspend when lid is closed ('lock screen' does not work, either). Selecting suspend from the logout button works fine. Opening lid while suspended wakes up the machine.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.8.0-41-lowlatency 4.8.0-41.44~16.04.1
ProcVersionSignature: Ubuntu 4.8.0-41.44~16.04.1-lowlatency 4.8.17
Uname: Linux 4.8.0-41-lowlatency x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Mar 10 22:49:56 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-03-06 (4 days ago)
InstallationMedia: Ubuntu-Studio 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215)
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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