[Bug 2070463] [NEW] Cannot upgrade from 18.04 to 20.04

[LEMONNIER]

Public bug reported:

I want to upgrade from Ubuntu 18.04 to ubuntu 20.04.

I had first a GPG erroR mentionning that 2 public keys were not
available, so I added them doing this : sudo apt-key adv --keyserver
keyserver.ubuntu.com --recv-keys [KEY]

Then I did :
sudo rm /var/lib/apt/lists/* -vf
sudo apt-get update && sudo apt-get upgrade
sudo apt --purge autoremove
sudo apt autoclean

No more GPG errors.

Then I tried again upgrading doing :
do-release-upgrade -p

Now I have this error :

"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'. "


I looked at the main.log and it was written that it "failed to remove" python-minimal and libpython-stdlib. Those 2 packages were also marked as "Broken" in the apt.log file. I manually removed them.

I still have the same error when trying to upgrade. When I grep "failed"
in the main.log, I get this :

2024-06-26 10:27:44,944 ERROR Dist-upgrade failed: 'E:Error,
pkgProblemResolver::Resolve generated breaks, this may be caused by held
packages.'

And I have 136 results for "Broken" in the apt.log file, but I dont know
if I sould delete them, I don't want to break something. Below the 5
first results for my grep "Broken" :

Broken dpkg:amd64 Breaks on libapt-pkg5.0:amd64 < 1.6.17 @ii mK > (< 1.7~b)
Broken gnome-settings-daemon-common:amd64 Breaks on gnome-settings-daemon-schemas:amd64 < 3.28.1-0ubuntu1.3 @ii mK > (< 3.30.1.2-2~)
Broken libpcre2-posix2:amd64 Conflicts on libpcre2-posix0:amd64 < 10.31-2 @ii mK >
Broken libldb2:amd64 Breaks on libldb1:amd64 < 2:1.2.3-1ubuntu0.2 @ii mK > (< 2:2~)
Broken libhdf5-103:amd64 Conflicts on libhdf5-100:amd64 < 1.10.0-patch1+docs-4 @ii mK >

Thank you for your help

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.45
ProcVersionSignature: Ubuntu 5.4.0-150.167~18.04.1-generic 5.4.233
Uname: Linux 5.4.0-150-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.29
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 26 09:52:22 2024
InstallationDate: Installed on 2019-09-13 (1747 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2024-06-26 (0 days ago)

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


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

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https://bugs.launchpad.net/bugs/2070463

Title:
  Cannot upgrade from 18.04  to  20.04

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

Bug description:
  I want to upgrade from Ubuntu 18.04 to ubuntu 20.04.

  I had first a GPG erroR mentionning that 2 public keys were not
  available, so I added them doing this : sudo apt-key adv --keyserver
  keyserver.ubuntu.com --recv-keys [KEY]

  Then I did :
  sudo rm /var/lib/apt/lists/* -vf
  sudo apt-get update && sudo apt-get upgrade
  sudo apt --purge autoremove
  sudo apt autoclean

  No more GPG errors.

  Then I tried again upgrading doing :
  do-release-upgrade -p

  Now I have this error :

  "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'. "

  
  I looked at the main.log and it was written that it "failed to remove" python-minimal and libpython-stdlib. Those 2 packages were also marked as "Broken" in the apt.log file. I manually removed them.

  I still have the same error when trying to upgrade. When I grep
  "failed" in the main.log, I get this :

  2024-06-26 10:27:44,944 ERROR Dist-upgrade failed: 'E:Error,
  pkgProblemResolver::Resolve generated breaks, this may be caused by
  held packages.'

  And I have 136 results for "Broken" in the apt.log file, but I dont
  know if I sould delete them, I don't want to break something. Below
  the 5 first results for my grep "Broken" :

  Broken dpkg:amd64 Breaks on libapt-pkg5.0:amd64 < 1.6.17 @ii mK > (< 1.7~b)
  Broken gnome-settings-daemon-common:amd64 Breaks on gnome-settings-daemon-schemas:amd64 < 3.28.1-0ubuntu1.3 @ii mK > (< 3.30.1.2-2~)
  Broken libpcre2-posix2:amd64 Conflicts on libpcre2-posix0:amd64 < 10.31-2 @ii mK >
  Broken libldb2:amd64 Breaks on libldb1:amd64 < 2:1.2.3-1ubuntu0.2 @ii mK > (< 2:2~)
  Broken libhdf5-103:amd64 Conflicts on libhdf5-100:amd64 < 1.10.0-patch1+docs-4 @ii mK >

  Thank you for your help

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.45
  ProcVersionSignature: Ubuntu 5.4.0-150.167~18.04.1-generic 5.4.233
  Uname: Linux 5.4.0-150-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.29
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jun 26 09:52:22 2024
  InstallationDate: Installed on 2019-09-13 (1747 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2024-06-26 (0 days ago)

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