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[Bug 1542912] Re: ubuntu-mate-core and lightdm do not upgrade cleanly


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.

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  ubuntu-mate-core and lightdm do not upgrade cleanly

Status in lightdm package in Ubuntu:

Bug description:
  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:
  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)

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