[Bug 1784157] Re: 'sudo update-manager -d' failed

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

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

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https://bugs.launchpad.net/bugs/1784157

Title:
  'sudo update-manager -d' failed

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

Bug description:
  I planned to update Ubuntu 16.04.5 LTS to Ubuntu 18.04 LTS through
  "sudo update-manager -d" but it prompted with:

  Could not calculate upgrade
  ...
  ..

  I followed and removed all PPAs and various packages installed but
  still unable to upgrade!

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
  Uname: Linux 4.4.0-131-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sat Jul 28 21:53:52 2018
  InstallationDate: Installed on 2016-12-30 (574 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-07-28 (0 days ago)
  VarLogDistupgradeTermlog:

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