[Bug 1795872] Re: upgrade to 16.04 to 18.01 fails - Could not determine the upgrade

[Brian Murray]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. The error that you are a reporting is a package conflict
between a package from the official Ubuntu archive and a package from a
PPA. To resolve this situation please uninstall the package from a PPA
using the tool 'ppa-purge' which is provided by the ppa-purge package.
Then try performing the package operations again. Thanks in advance!

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

** Tags added: package-conflict ppa-conflict

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https://bugs.launchpad.net/bugs/1795872

Title:
  upgrade to 16.04 to 18.01 fails - Could not determine the upgrade

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

Bug description:
  no real information just says it cannot do it ????

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-137.163-generic 4.4.144
  Uname: Linux 4.4.0-137-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed Oct  3 12:44:35 2018
  InstallationDate: Installed on 2016-08-30 (763 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-10-03 (0 days ago)

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