[Bug 2078816] Re: Cannot upgrade Xubuntu+MATE hybrid 22.04 to 24.04

[TragicWarrior]

A few days ago, do-release-upgrade started reporting that a new version
was available.  I gave it a try but the outcome was no better.  It seems
to have a real problem with Xubuntu packages.  It reports that I have
held broken packages but "sudo apt-mark showheld" reports nothing nor
does "sudo apt --fix-broken install"

2024-09-13 08:53:40,451 WARNING Can't mark 'xubuntu-core' for upgrade (E:Unable to correct problems, you have held broken packages.)
2024-09-13 08:53:40,451 DEBUG Marking 'xubuntu-desktop' for upgrade
2024-09-13 08:53:41,017 WARNING Can't mark 'xubuntu-desktop' for upgrade (E:Unable to correct problems, you have held broken packages.)
2024-09-13 08:53:41,017 DEBUG Marking 'ubuntu-mate-core' for upgrade
2024-09-13 08:53:41,531 WARNING Can't mark 'ubuntu-mate-core' for upgrade (E:Unable to correct problems, you have held broken packages.)
2024-09-13 08:53:41,532 DEBUG Marking 'ubuntu-mate-desktop' for upgrade
2024-09-13 08:53:42,071 WARNING Can't mark 'ubuntu-mate-desktop' for upgrade (E:Unable to correct problems, you have held broken packages.)
2024-09-13 08:53:42,602 ERROR Dist-upgrade failed: 'Broken packages after upgrade: xubuntu-core, xubuntu-desktop'

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https://bugs.launchpad.net/bugs/2078816

Title:
  Cannot upgrade Xubuntu+MATE hybrid 22.04 to 24.04

Status in ubuntu-mate-meta package in Ubuntu:
  New
Status in ubuntu-release-upgrader package in Ubuntu:
  New
Status in xubuntu-meta package in Ubuntu:
  New

Bug description:
  Description:	Ubuntu 22.04.4 LTS
  Release:	22.04

  Running do-release-upgrade

  Could not calculate the upgrade

  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'. 

  
  Restoring original system state

  
  I've tried all of the normal cleaning of source repos and disabling third-party repos.  Nothing really helps.  It looks like core pieces of Xubuntu are causing the problem from the logs and that shouldn't be the case.

  Last few lines of /var/log/dist-upgrade/main.log are as follows:

  2024-09-03 08:26:57,494 INFO installing linux metapackage: linux-generic
  2024-09-03 08:26:57,494 DEBUG Installing 'linux-generic' (linux metapackage may have been accidentally uninstalled)
  2024-09-03 08:26:57,525 DEBUG Marking 'xubuntu-core' for upgrade
  2024-09-03 08:26:58,037 WARNING Can't mark 'xubuntu-core' for upgrade (E:Unable to correct problems, you have held broken packages.)
  2024-09-03 08:26:58,037 DEBUG Marking 'xubuntu-desktop' for upgrade
  2024-09-03 08:26:58,617 WARNING Can't mark 'xubuntu-desktop' for upgrade (E:Unable to correct problems, you have held broken packages.)
  2024-09-03 08:26:58,618 DEBUG Marking 'ubuntu-mate-core' for upgrade
  2024-09-03 08:26:59,200 WARNING Can't mark 'ubuntu-mate-core' for upgrade (E:Unable to correct problems, you have held broken packages.)
  2024-09-03 08:26:59,200 DEBUG Marking 'ubuntu-mate-desktop' for upgrade
  2024-09-03 08:26:59,810 WARNING Can't mark 'ubuntu-mate-desktop' for upgrade (E:Unable to correct problems, you have held broken packages.)
  2024-09-03 08:27:00,354 ERROR Dist-upgrade failed: 'Broken packages after upgrade: xubuntu-core, xubuntu-desktop'

  Running apt-mark showheld reveals no held packages

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.19
  ProcVersionSignature: Ubuntu 6.8.0-40.40~22.04.3-generic 6.8.12
  Uname: Linux 6.8.0-40-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.6
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Tue Sep  3 08:29:09 2024
  InstallationDate: Installed on 2021-04-13 (1239 days ago)
  InstallationMedia: Xubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to jammy on 2024-09-03 (0 days ago)

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