[Bug 1805192] Re: package update-notifier-common 0.154.1ubuntu3 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 127

[Steve Langasek]

Thank you for reporting this bug and helping to improve Ubuntu.

The error in your log is:

Processing triggers for update-notifier-common (0.154.1ubuntu3) ...
/var/lib/dpkg/info/update-notifier-common.postinst: 16: /var/lib/dpkg/info/update-notifier-common.postinst: /usr/lib/update-notifier/package-data-downloader: not found
dpkg: error processing package update-notifier-common (--purge):
 le sous-processus script post-installation installé a retourné une erreur de sortie d'état 127
[...]

This is unusual; if the package is being purged, then there is no reason
that the trigger for the package should be called.  This looks to me
like it may be some sort of bug in dpkg in terms of handling the state
of a package in the process of being removed.  Reassigning this bug to
dpkg.

However, I also notice from your logs that the reason that this package
is being purged is that you are trying to run 'apt purge
python2.7-minimal' on an Ubuntu 14.04 system.  As the logs show, this
tries to remove a large number of packages which as of Ubuntu 14.04
still required python2.  It removes the ubuntu-desktop metapackage,
which means future upgrades of your system cannot be handled as
expected.

If you want to remove python2.7 from your system, I would recommend you
first upgrade to the current supported LTS release (Ubuntu 18.04 LTS),
which no longer pulls python2.7 into the Ubuntu Desktop.

** Package changed: update-notifier (Ubuntu) => dpkg (Ubuntu)

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https://bugs.launchpad.net/bugs/1805192

Title:
  package update-notifier-common 0.154.1ubuntu3 failed to
  install/upgrade: le sous-processus script post-installation installé a
  retourné une erreur de sortie d'état 127

Status in dpkg package in Ubuntu:
  New

Bug description:
  ,

  ProblemType: Package
  DistroRelease: Ubuntu 14.04
  Package: update-notifier-common 0.154.1ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-137.163~14.04.1-generic 4.4.144
  Uname: Linux 4.4.0-137-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.29
  Architecture: amd64
  Date: Wed Nov 14 20:09:47 2018
  DuplicateSignature: package:update-notifier-common:0.154.1ubuntu3:le sous-processus script post-installation installé a retourné une erreur de sortie d'état 127
  ErrorMessage: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 127
  InstallationDate: Installed on 2015-12-21 (1070 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  RelatedPackageVersions:
   dpkg 1.17.5ubuntu5.8
   apt  1.0.1ubuntu2.18
  SourcePackage: update-notifier
  Title: package update-notifier-common 0.154.1ubuntu3 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 127
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.apt.apt.conf.d.10periodic:
   APT::Periodic::Update-Package-Lists "1";
   APT::Periodic::Download-Upgradeable-Packages "0";
   APT::Periodic::AutocleanInterval "0";
   APT::Periodic::Unattended-Upgrade "0";
  mtime.conffile..etc.apt.apt.conf.d.10periodic: 2017-12-03T10:35:47.005068

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