[Bug 1928546] Re: Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade. This was caused by: * Upgrading to a pre-release version of Ubuntu This is most likely a transient problem, please try again later. 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'. drian at wad:~$ update-manager -d Checking for a new Ubuntu release Checking for a new Ubuntu release authenticate 'hirsute.tar.gz' against 'hirsute.tar.gz.gpg' extracting 'hirsute.tar.gz' No candidate ver: libpng12-0:i386 No candidate ver: libtiff4:i386

[Brian Murray]

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

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https://bugs.launchpad.net/bugs/1928546

Title:
  Could not calculate the upgrade  An unresolvable problem occurred
  while calculating the upgrade.   This was caused by:  * Upgrading to a
  pre-release version of Ubuntu This is most likely a transient problem,
  please try again later. 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'. drian at wad:~$ update-
  manager -d Checking for a new Ubuntu release Checking for a new Ubuntu
  release authenticate 'hirsute.tar.gz' against 'hirsute.tar.gz.gpg'
  extracting 'hirsute.tar.gz' No candidate ver:  libpng12-0:i386 No
  candidate ver:  libtiff4:i386

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

Bug description:
  resolved problem by installing python2

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: ubuntu-release-upgrader-core 1:20.10.15
  ProcVersionSignature: Ubuntu 5.8.0-53.60-generic 5.8.18
  Uname: Linux 5.8.0-53-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu50.6
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sat May 15 15:25:28 2021
  InstallationDate: Installed on 2021-03-26 (49 days ago)
  InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to groovy on 2021-05-15 (0 days ago)
  VarLogDistupgradeTermlog:

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