[Bug 1896386] Re: An unresolvable problem occurred while calculating the upgrade. 18.04 to 20.04

[Daniel Letzeisen]

*** This bug is a duplicate of bug 1896380 ***
    https://bugs.launchpad.net/bugs/1896380

You still have packages from oibaf PPA installed and they are
interfering with the upgrade. I see in your other bug report, you had an
issue with ppa-purge. You have to solve that first.

** This bug has been marked a duplicate of bug 1896380
   An unresolvable problem occurred while calculating the upgrade. 18.04 to 20.04

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https://bugs.launchpad.net/bugs/1896386

Title:
  An unresolvable problem occurred while calculating the upgrade. 18.04
  to 20.04

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

Bug description:
  I have removed ppas using ppa-purge and I'm running nouveau driver for
  nivida.

  I still get the error.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  Uname: Linux 5.7.1-050701-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sun Sep 20 17:29:28 2020
  InstallationDate: Installed on 2018-08-26 (756 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-20 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2020-08-22T23:06:48.773333

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