[Bug 2049969] [NEW] unresolvable problem upgrading 18.04 to 20.04

[Stripes Theotoky]

Public bug reported:

I took the following steps with this result.

lsb_release -rd
Description:	Ubuntu 18.04.6 LTS
Release:	18.04

sudo apt update
sudo apt upgrade
sudo apt autoremove

find /etc/apt/sources.list.d -type f -name "*.list" -print0 |     while
read -d $'\0' file; do awk -F/ '/deb / && /ppa\.launchpad\.net/ {print
"sudo ppa-purge ppa:"$4"/"$5}' "$file"; done

sudo ppa-purge ppa:otto-kesselgulasch/gimp
sudo ppa-purge ppa:atareao/telegram
sudo ppa-purge ppa:obsproject/obs-studio

sudo do-release-upgrade

Calculating the changes

Could not determine the upgrade

An unresolvable problem occurred while calculating the upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.45
ProcVersionSignature: Ubuntu 4.15.0-213.224-generic 4.15.18
Uname: Linux 4.15.0-213-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.29
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sat Jan 20 11:29:58 2024
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
InstallationDate: Installed on 2017-07-14 (2380 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2024-01-20 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2018-08-01T09:28:36.284395

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


** Tags: amd64 apport-bug bionic dist-upgrade wayland-session

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https://bugs.launchpad.net/bugs/2049969

Title:
  unresolvable problem upgrading 18.04 to 20.04

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

Bug description:
  I took the following steps with this result.

  lsb_release -rd
  Description:	Ubuntu 18.04.6 LTS
  Release:	18.04

  sudo apt update
  sudo apt upgrade
  sudo apt autoremove

  find /etc/apt/sources.list.d -type f -name "*.list" -print0 |
  while read -d $'\0' file; do awk -F/ '/deb / && /ppa\.launchpad\.net/
  {print "sudo ppa-purge ppa:"$4"/"$5}' "$file"; done

  sudo ppa-purge ppa:otto-kesselgulasch/gimp
  sudo ppa-purge ppa:atareao/telegram
  sudo ppa-purge ppa:obsproject/obs-studio

  sudo do-release-upgrade

  Calculating the changes

  Could not determine the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.45
  ProcVersionSignature: Ubuntu 4.15.0-213.224-generic 4.15.18
  Uname: Linux 4.15.0-213-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.29
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Jan 20 11:29:58 2024
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-xenial-amd64-20160624-2
  InstallationDate: Installed on 2017-07-14 (2380 days ago)
  InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2024-01-20 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2018-08-01T09:28:36.284395

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