[Bug 2044614] Re: Upgrading from lunar to mantic fails

[Kellen Renshaw]

I ran into a similar, if not identical issue during a Jammy -> Lunar ->
Mantic upgrade where Jammy to Lunar worked fine but the upgrade to
Mantic failed with the error in this bug.

I was able to upgrade by removing the ubuntu-desktop, ubuntu-desktop-
minimal, and ubuntu-minimal packages and reinstalling them after the
upgrade to Mantic.

Attaching the contents of /var/log/dist-upgrade for that machine in case
it helps.

** Attachment added: "upgrade_logs.tgz"
   https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2044614/+attachment/5724761/+files/upgrade_logs.tgz

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https://bugs.launchpad.net/bugs/2044614

Title:
  Upgrading from lunar to mantic fails

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

Bug description:
  When trying to upgrade from lunar to mantic, I originally got the
  following error message:

  > An unresolvable problem occurred while calculating the upgrade.
  > 
  >  This was likely caused by:
  >  * Unofficial software packages not provided by Ubuntu
  > Please use the tool 'ppa-purge' from the ppa-purge 
  > package to remove software from a Launchpad PPA and 
  > try the upgrade again.
  > 
  > 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'.

  I tried the following steps to fix the issue:

  - made sure my apt sources didn't contain PPA packages or external
  sources:

      egrep -v '^#|^ *$' /etc/apt/sources.list /etc/apt/sources.list.d/*
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar main restricted
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar-updates main restricted
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar universe
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar-updates universe
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar multiverse
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar-updates multiverse
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar-backports main restricted universe multiverse
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar-security main restricted
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar-security universe
      /etc/apt/sources.list:deb http://mirror.eu-fr.kamatera.com/ubuntu/ lunar-security multiverse

  - made sure I didn't have any foreign repositories installed:

      grep Foreign /var/log/dist-upgrade/main.log
      2023-11-25 19:10:41,959 DEBUG Foreign: 

  - I remembered that `sudo apt upgrade` had shown some "held back"
    packages, so I installed all of them with
    `sudo apt-get --with-new-pkgs upgrade <list of held-back packages>`.
    Afterwards, `sudo apt upgrade` no longer showed any held-back packages.

  When I now try to update to mantic, I get a slightly shorter error
  message:

  > 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'.

  (including the space at the beginning of the last paragraph (before
  "If none of this ..."), which indicates to me that may there be should
  have been a list of possible reasons here but it just happens to be
  empty in my case)

  ProblemType: Bug
  DistroRelease: Ubuntu 23.04
  Package: ubuntu-release-upgrader-core 1:23.04.7
  ProcVersionSignature: Ubuntu 6.2.0-37.38-generic 6.2.16
  Uname: Linux 6.2.0-37-generic x86_64
  ApportVersion: 2.26.1-0ubuntu2.1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CrashReports:
   640:0:123:2808025:2023-11-25 13:15:52.076979189 +0100:2023-11-25 13:15:52.124979290 +0100:/var/crash/_usr_lib_bluetooth_bluetoothd.0.crash
   644:0:123:0:2023-11-25 13:15:52.076979189 +0100:2023-11-25 13:15:52.076979189 +0100:/var/crash/_usr_lib_bluetooth_bluetoothd.0.upload
   600:116:123:37:2023-11-25 13:15:53.364981874 +0100:2023-11-25 13:15:53.364981874 +0100:/var/crash/_usr_lib_bluetooth_bluetoothd.0.uploaded
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Nov 25 18:56:36 2023
  InstallationDate: Installed on 2022-03-10 (625 days ago)
  InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to lunar on 2023-11-25 (0 days ago)
  VarLogDistupgradeTermlog:

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