ubuntu-mate-core and lightdm do not upgrade cleanly

[Winfried PLappert]

When upgrading from ubuntu-mate alpha2 to the current version in the repositories, the upgrade throws an error after executing "sudo apt-get install -f":

insserv: Service dbus has to be enabled to start service lightdm
insserv: exiting now!
update-rc.d: error: insserv rejected the script header
dpkg: error processing package lightdm (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of ubuntu-mate-core:
 ubuntu-mate-core depends on lightdm; however:
  Package lightdm is not configured yet.

dpkg: error processing package ubuntu-mate-core (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                          Errors were encountered while processing:
 lightdm
 ubuntu-mate-core
E: Sub-process /usr/bin/dpkg returned an error code (1)

additional info:
lsb_release -rd
Description: Ubuntu Xenial Xerus (development branch)
Release: 16.04

. What you expected to happen: clean upgrade
. What happened instead: errors, as show above.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.4
ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
Uname: Linux 4.4.0-2-generic x86_64
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: MATE
Date: Sun Feb 7 14:02:50 2016
InstallationDate: Installed on 2016-02-06 (0 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160127.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)

[Winfried PLappert (winfried-plappert)]

Ubuntu Mate is running as guest in a VirtualBox environment.

[Winfried PLappert (winfried-plappert)]

here is:
/var/log/dpkg.log

[Winfried PLappert (winfried-plappert)]

here is:
/var/log/apt/history.log

[Winfried PLappert (winfried-plappert)]

here is:
/var/log/apt/term.log

[Winfried PLappert (winfried-plappert)]

Additional information:
1.) I did a fresh install, updated the kernel and rebooted.
2.) I manually upgraded lightdm and ubuntu-mate-core immediately => everything ok.
3.) sudo apt-get upgrade and everything is fine, no bug to be seen.
4.) Obviously the order in which the upgrade is applied is important. Something got screwed up with the automatic ordering of applying the updates.