[Bug 1837271] Re: trying to update ubuntu

[Chris Guiver]

Thank you for taking the time to report this bug and trying to help make
Ubuntu better.

Your initial description provides the error message

"was likely caused by Unofficial software packages..  Please use the
tool 'ppa-purge' ..."

which you then stated "I have done it but it appears again"

Your system messages though still show many packages that are Unofficial
16.04 packages from non-Ubuntu sources, eg.

Broken ros-kinetic-rqt-robot-steering:amd64 Depends on ros-kinetic-
rostopic [ amd64 ] < 1.12.14-0xenial-20190608-041049-0800

You may have removed some of your sources that were creating problems,
but as far as I can see the message still covers other sources &
packages that were not yet removed.

If you are interested in learning more about software repositories and
Ubuntu, check https://help.ubuntu.com/community/Repositories.

If you believe this is wrong, please respond with more detail and you can change the status back to 'New'.
Thanks again for for taking the time to report this bug and helping to make Ubuntu better

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

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https://bugs.launchpad.net/bugs/1837271

Title:
  trying to update ubuntu

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

Bug description:
  I am trying to update ubuntu it said me:
  An unresolvable problem occurred while calculating the upgrade.

   This was likely caused by:
   * Unofficial software packages not provided by Ubuntu
  Please use the tool 'ppa-purge' from the ppa-purge 
  package to remove software from a Launchpad PPA and 
  try the upgrade again.

  
  I have done it but it appears again

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.26
  ProcVersionSignature: Ubuntu 4.15.0-54.58~16.04.1-generic 4.15.18
  Uname: Linux 4.15.0-54-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sat Jul 20 07:56:41 2019
  InstallationDate: Installed on 2018-10-27 (265 days ago)
  InstallationMedia: Ubuntu 16.04.5 LTS "Xenial Xerus" - Release amd64 (20180731)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2019-07-20 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2019-07-14T12:46:01.111097

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