[Bug 1791020] Re: Fail to upgrade to 18.04LTS from 16.04LTS

[Brian Murray]

You'll want to use the tool ppa-purge from the package ppa-purge to
remove the PPA you have enabled which provides the Xorg packages.

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https://bugs.launchpad.net/bugs/1791020

Title:
  Fail to upgrade to 18.04LTS from 16.04LTS

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

Bug description:
  I really have no idea why I can't upgrade to 18.04LTS.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-135.161-generic 4.4.140
  Uname: Linux 4.4.0-135-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Sep  6 15:18:22 2018
  InstallationDate: Installed on 2018-01-01 (248 days ago)
  InstallationMedia: Ubuntu-Kylin 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-09-06 (0 days ago)

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