[Bug 1800031] Re: Unable to upgrade xubuntu 18.04 to 18.10 with do-release-upgrade

[Ubuntu Foundations Team Bug Bot]

** Tags added: bionic2cosmic

** Tags added: third-party-packages

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https://bugs.launchpad.net/bugs/1800031

Title:
  Unable to upgrade xubuntu 18.04 to 18.10 with do-release-upgrade

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

Bug description:
  Executing the do-release-upgrade command, it ends with the following
  info:

  Calculating the changes

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  This can be caused by: 
  * Upgrading to a pre-release version of Ubuntu 
  * Running the current pre-release version of Ubuntu 
  * Unofficial software packages not provided by Ubuntu 

  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.27
  ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
  Uname: Linux 4.15.0-38-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Thu Oct 25 22:07:35 2018
  InstallationDate: Installed on 2017-09-08 (412 days ago)
  InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2018-10-25 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2018-07-05T09:11:12.937488

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