package acpid 1:2.0.28-1ubuntu1 failed to install/upgrade: installed acpid package post-installation script subprocess returned error exit status 1

Upgrading from 16.04 LTS to 18.04 LTS using apt dist-upgrade. Upgrade failed to boot image 4.15.0-33-generic. Had to revert to 4.4.0-134-generic to get to the desktop.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: acpid 1:2.0.28-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-134.160-generic 4.4.140
Uname: Linux 4.4.0-134-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.3
AptOrdering:
 xscreensaver:amd64: Remove
 NULL: ConfigurePending
Architecture: amd64
Date: Mon Sep 10 14:28:26 2018
DpkgHistoryLog:
 Start-Date: 2018-09-10 14:28:18
 Remove: xscreensaver:amd64 (5.36-1ubuntu1)
ErrorMessage: installed acpid package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2017-04-27 (500 days ago)
InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.8)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3ubuntu0.1
SourcePackage: acpid
Title: package acpid 1:2.0.28-1ubuntu1 failed to install/upgrade: installed acpid package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)