[Bug 1793858] Re: While upgrading from 16.04 to 18.04 it could not calculate the upgrade

[Ubuntu Foundations Team Bug Bot]

** Tags added: xenial2bionic

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https://bugs.launchpad.net/bugs/1793858

Title:
  While upgrading from 16.04 to 18.04 it could not calculate the upgrade

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

Bug description:
  I have been trying to upgrade to 18.04 (now running is 16.04). It says
  that it cannot calculate the upgrade, the given causes are first
  upgrading to a pre-release version, this is not the case since 18.04
  has been released a month ago. Secondly, that I'm running the current
  pre-release, which is also not the case since I run 16.04. Lastly,
  that it upgrades with unofficial packages not provided by Ubuntu,
  however, I've been trying to upgrade using the update manager which is
  an Ubuntu application so that also should not be the case. Further
  information, I'm using a dual boot together with windows 10. Both run
  on a different SSD.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.15.0-34.37~16.04.1-generic 4.15.18
  Uname: Linux 4.15.0-34-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sat Sep 22 09:09:41 2018
  InstallationDate: Installed on 2018-03-20 (185 days ago)
  InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-09-22 (0 days ago)
  VarLogDistupgradeTermlog:

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