[Bug 1991803] [NEW] realease upgrade 20.04 to 22.04 fails

[Vincenzo Daniele]

Public bug reported:

I have several ubuntu 20.04 machines as VMs on KVM.
All but one of them survived an upgrade to 22.04.


At my problem machine during 'do-release-upgrade' the message appears:

---
Calculating the changes

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'. 


Restoring original system state

Aborting
---

Mys system is:
root at myhost:# lsb_release -rd
Description:    Ubuntu 20.04.5 LTS
Release:        20.04

I'd expect to have a release upgrade in the end.


Thank you in advance,

V. Daniele

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.39
ProcVersionSignature: Ubuntu 5.4.0-126.142-generic 5.4.203
Uname: Linux 5.4.0-126-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
Date: Wed Oct  5 16:00:25 2022
InstallationDate: Installed on 2016-09-19 (2207 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2022-10-05 (0 days ago)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade focal

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https://bugs.launchpad.net/bugs/1991803

Title:
  realease upgrade 20.04 to 22.04 fails

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

Bug description:
  I have several ubuntu 20.04 machines as VMs on KVM.
  All but one of them survived an upgrade to 22.04.

  
  At my problem machine during 'do-release-upgrade' the message appears:

  ---
  Calculating the changes

  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'. 

  
  Restoring original system state

  Aborting
  ---

  Mys system is:
  root at myhost:# lsb_release -rd
  Description:    Ubuntu 20.04.5 LTS
  Release:        20.04

  I'd expect to have a release upgrade in the end.

  
  Thank you in advance,

  V. Daniele

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.39
  ProcVersionSignature: Ubuntu 5.4.0-126.142-generic 5.4.203
  Uname: Linux 5.4.0-126-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Wed Oct  5 16:00:25 2022
  InstallationDate: Installed on 2016-09-19 (2207 days ago)
  InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2022-10-05 (0 days ago)

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