[Bug 1800563] Re: Unresolvable problem trying to upgrade to 18.10 Cosmic

[Brian Murray]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. The error that you are a reporting is a conflict between
packages from the official Ubuntu archive and packages from a PPA. To
resolve this situation please deactivate PPAs using the tool 'ppa-purge'
which is provided by the ppa-purge package. Then try performing the
release upgrade again. Thanks in advance!

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

** Tags added: ppa-conflict

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https://bugs.launchpad.net/bugs/1800563

Title:
  Unresolvable problem trying to upgrade to 18.10 Cosmic

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

Bug description:
  Maybe related to #1798729, but I don't have that packages installed,
  so the problem should be another set of installed packages.

  Log:

  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Calculating the changes

  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
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Oct 29 23:29:42 2018
  InstallationDate: Installed on 2018-03-11 (232 days ago)
  InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180310)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2018-10-29 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2018-03-11T19:10:26.785834

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