[Bug 1788906] Re: Trying to upgrade Ubuntu to latest version

Tue Aug 28 08:27:36 UTC 2018

You must not only remove the PPA entries but also remove the software
installed from these PPAs or revert to versions from the official Ubuntu
repositories. That's why Brian recommended to use ppa-purge instead of
just removing them with the Software Properties tool.

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https://bugs.launchpad.net/bugs/1788906

Title:
  Trying to upgrade Ubuntu to latest version

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

Bug description:
  I tried to upgrade my Ubuntu 16.04 LTS to the latest version 18.
  It always failed: Package dependencies cannot be resolved etc

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-134.160-generic 4.4.140
  Uname: Linux 4.4.0-134-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Aug 24 19:26:41 2018
  InstallationDate: Installed on 2016-04-24 (852 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-08-24 (0 days ago)
  VarLogDistupgradeTermlog:

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