[Bug 1928743] Re: started the 20.xx upgrade, allowed to start adn crashed ould not calculate the upgrade 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'

[Brian Murray]

Thanks for taking the time to report this upgrade failure. There is
currently a new version of the release upgrader available in -proposed
which may resolve the error you've encountered. Please run the following
command to test the new version of the upgrader:

  do-release-upgrade -p

Please lets us know the results in this bug report. Thanks again and
good luck!

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

** Tags added: lp-1928397

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https://bugs.launchpad.net/bugs/1928743

Title:
  started the 20.xx upgrade, allowed to start adn crashed ould not
  calculate the upgrade  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'

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

Bug description:
  Current distro:
  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04

  Started distro upgrade to 20.04 - error and stalled at setting new
  software channels

  Could not calculate the upgrade

  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'.

  see main.log attached

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.44
  ProcVersionSignature: Ubuntu 4.15.0-143.147-generic 4.15.18
  Uname: Linux 4.15.0-143-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Mon May 17 21:58:37 2021
  InstallationDate: Installed on 2021-04-13 (34 days ago)
  InstallationMedia: ChaletOS 16.04 - Release amd64
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-05-18 (0 days ago)
  VarLogDistupgradeTermlog:

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