[Bug 1899000] [NEW] Upgrade 18.04 --> 20.04 fails

[Peter Eppmann]

Public bug reported:

"lsb_release -rd" reads:
Description:	Ubuntu 18.04.5 LTS
Release:	18.04

Expected behaviour: Perform the dist upgrade

What happened: Upgrade fails, /var/log/dist-upgrade/main.log end with

...
2020-10-08 10:45:24,510 DEBUG Removing 'python-minimal' (python-is-python2 is being installed on the system)
2020-10-08 10:45:24,510 INFO failed to remove python-minimal
2020-10-08 10:45:44,535 ERROR Dist-upgrade failed: 'E:Fehler: Unterbrechungen durch pkgProblemResolver::Resolve hervorgerufen; dies könnte durch zurück
gehaltene Pakete verursacht worden sein.
...

No glue if this is the very reason or simply non sense...

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
Uname: Linux 4.15.0-118-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.18
Architecture: amd64
CrashDB: ubuntu
Date: Thu Oct  8 10:45:42 2020
InstallationDate: Installed on 2017-02-04 (1341 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-10-08 (0 days ago)
VarLogDistupgradeTermlog:

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


** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1899000

Title:
  Upgrade 18.04 --> 20.04 fails

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

Bug description:
  "lsb_release -rd" reads:
  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04

  Expected behaviour: Perform the dist upgrade

  What happened: Upgrade fails, /var/log/dist-upgrade/main.log end with

  ...
  2020-10-08 10:45:24,510 DEBUG Removing 'python-minimal' (python-is-python2 is being installed on the system)
  2020-10-08 10:45:24,510 INFO failed to remove python-minimal
  2020-10-08 10:45:44,535 ERROR Dist-upgrade failed: 'E:Fehler: Unterbrechungen durch pkgProblemResolver::Resolve hervorgerufen; dies könnte durch zurück
  gehaltene Pakete verursacht worden sein.
  ...

  No glue if this is the very reason or simply non sense...

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
  Uname: Linux 4.15.0-118-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Thu Oct  8 10:45:42 2020
  InstallationDate: Installed on 2017-02-04 (1341 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-10-08 (0 days ago)
  VarLogDistupgradeTermlog:

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1899000/+subscriptions