[Bug 1826725] Re: Cant update to 19.04 Cant calculate update

[Brian Murray]

Your VarLogDistupgradeAptclonesystemstate.tar.gz file indicates that you
still had packages from PPAs installed at the time of the upgrade
attempt. If you purged the PPAs after reporting the bug please open a
new bug report using 'ubuntu-bug ubuntu-release-upgrader' and we'll make
this one a duplicate of the new one.

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https://bugs.launchpad.net/bugs/1826725

Title:
  Cant update to 19.04 Cant calculate update

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

Bug description:
  The update  with do-release-upgrade fails with error:

  An unresolvable problem occurred while calculating the upgrade.

  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If 
  you want to investigate this yourself the log files in 
  '/var/log/dist-upgrade' will contain details about the upgrade. 
  Specifically, look at 'main.log' and 'apt.log'.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: ubuntu-release-upgrader-core 1:18.10.11.6
  ProcVersionSignature: Ubuntu 4.18.0-18.19-generic 4.18.20
  Uname: Linux 4.18.0-18-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.10-0ubuntu13.3
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Sun Apr 28 12:48:54 2019
  InstallationDate: Installed on 2018-04-18 (374 days ago)
  InstallationMedia: Ubuntu-MATE 17.10 "Artful Aardvark" - Release amd64 (20180106)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to cosmic on 2019-04-28 (0 days ago)

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