Unable to login after locking screen, unable to lock screen via gui menu

[Jamie S.]

Using AMDGPU-Pro
dpkg -l amdgpu-pro
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-================-=============-=============-=====================================
ii amdgpu-pro 17.10-450821 amd64 Meta package to install amdgpu Pro co

Upgraded from amdgpu-pro-17.10-429170 where it was also broken, installed all available updates prior to the driver being installed. Can manually lock the screen using Ctrl-Alt-L but have to use loginctl unlock-sessions to unlock

Not seeing the debugging symbols needed to properly look into this issue to install to provide more information

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: apport-kde 2.20.1-0ubuntu2.10
ProcVersionSignature: Ubuntu 4.4.0-87.110-generic 4.4.73
Uname: Linux 4.4.0-87-generic x86_64
ApportLog:

ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: KDE
Date: Sun Jul 30 12:38:33 2017
ExecutablePath: /usr/share/apport/apport-kde
InstallationDate: Installed on 2016-09-18 (314 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
InterpreterPath: /usr/bin/python3.5
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)