[Bug 1791208] Re: Fail to upgrade to 18.04LTS from 16.04LTS

[Brian Murray]

It is not enough to remove the sources.list files from the
sources.list.d folder, you need to also install the official version of
the package you installed from the ppa. This can be done with the tool
ppa-purge from the package ppa-purge.  Thanks!

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

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https://bugs.launchpad.net/bugs/1791208

Title:
  Fail to upgrade to 18.04LTS from 16.04LTS

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

Bug description:
  The same warning information as the case described in
  https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-
  upgrader/+bug/1791020 after I delected all ppa list files in the
  source.list.d folder , updated and upgraded. I also install the
  official version xorg as a good one told me. Now I just don't know how
  to get this down.

  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: Fri Sep  7 11:00:43 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 2018-09-07 (0 days ago)
  VarLogDistupgradeTermlog:

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