[Bug 1914963] Re: Unable to upgrade to 20.04, could not calculate upgrade.

[Brian Murray]

Removing the package python-dev should allow the upgrade to complete.

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

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https://bugs.launchpad.net/bugs/1914963

Title:
  Unable to upgrade to 20.04, could not calculate upgrade.

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

Bug description:
  I'm currently using Ubuntu 18.04.5 LTS and I'm trying to upgrade to
  20.04. I keep getting the 'could not calculate upgrade' error. I have
  searched through bug reports exhaustively and cannot find the
  solution. I have no broken packages according to apt and aptitude. I
  don't know what to do. I've removed everything that shows up in
  previous bug reports as causing problems.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 5.4.0-65.73~18.04.1-generic 5.4.78
  Uname: Linux 5.4.0-65-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Feb  7 15:20:03 2021
  InstallationDate: Installed on 2019-03-12 (698 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/usr/bin/zsh
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-02-07 (0 days ago)
  VarLogDistupgradeTermlog:

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