[Bug 1898467] Re: "Could not calculate the upgrade" error while upgrading from 18.04 to 20.04.1

[Shivanshu Siyanwal]

** Attachment added: "Using the command " grep ERROR /var/log/dist-upgrade/main.log gi ves this result. Here I don't understand what packages am I supposed to remove. "Ubuntu Desktop"?"
   https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1898467/+attachment/5417544/+files/Screenshot%20from%202020-10-04%2021-31-34.png

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https://bugs.launchpad.net/bugs/1898467

Title:
  "Could not calculate the upgrade" error while upgrading from 18.04 to
  20.04.1

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

Bug description:
  I was trying to upgrade from Ubuntu 18.04 to 20.04.1 . I installed the
  latest software updates as recommended. I started the upgrade process
  but keep getting this error

  "Could not calculate the upgrade

  This was likely caused by:
  *Unoffocial software packages not provided by Ubuntu."

  It recommended the usage of ppa-purge. I installed that command package.
  Then I used the command " grep Broken /var/log/dist-upgrade/apt.log" to get the list of the programs that might need to get purged. But I got a list of hundreds of programs. Now I am confused about what to do. How do I find which ppa to purge or which program to remove?

  I just started using Ubuntu so don't know anything about how all of
  this works. Can you help me out?

  Thank you

  1) Ubuntu 18.04.5 LTS
  2) 
  3) Expected an upgrade from 18.04.5 to 20.04.1
  4) The upgrade did not complete due to some error.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.39
  ProcVersionSignature: Ubuntu 5.4.0-49.53~18.04.1-generic 5.4.65
  Uname: Linux 5.4.0-49-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sun Oct  4 20:59:39 2020
  InstallationDate: Installed on 2020-04-04 (183 days ago)
  InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_IN:en
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-10-04 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-10-04T17:33:12.039655

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