[Bug 1739934] Re: release upgrade failing from zesty to artful

[Markus]

background info:

system had been installed under hardy heron and upgraded many times.
Last running OS on this hardware config was 17.10 artful.

Many years have passed and very little of the original hardware hasn't
been replaced. I decided I wanted to clean out the cruft and do a clean
start. So I started with mythbuntu-16.04.3-desktop-amd64.iso from a USB
stick. Additional xfs media disks / boot backups had to be disconnected.
Otherwise the installer would hang. System was installed onto a clean
partition. After the installation was finished and all apt upgrades were
done, release was switched from lts to normal. From there I tried to run
"do-release-upgrade" successively to get to 17.10. The last stage failed
with the error above.

After fixing the mythbuntu-desktop package problem by doing another "apt
dist-upgrade" the final upgrade to 17.10 worked fine. So this may not be
a bug, but rather a package configuration issue. The installer isn't
very good at communicating underlying issues up to the user.

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https://bugs.launchpad.net/bugs/1739934

Title:
  release upgrade failing from zesty to artful

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  system is a brand new mythbuntu install that had just finished the
  release upgrade to zesty.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: ubuntu-release-upgrader-core 1:17.04.10
  ProcVersionSignature: Ubuntu 4.10.0-42.46-generic 4.10.17
  Uname: Linux 4.10.0-42-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4.9
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sat Dec 23 19:48:49 2017
  InstallationDate: Installed on 2017-12-24 (0 days ago)
  InstallationMedia: Mythbuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
  PackageArchitecture: all
  ProcEnviron:
   TERM=vt100
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to zesty on 2017-12-24 (0 days ago)

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