[Bug 1683925] Re: package update-notifier-common 3.168.4 failed to install/upgrade: package update-notifier-common is not ready for configuration cannot configure (current status 'half-installed')

[Paul Annetts]

I hit this too in a manual apt-get upgrade. Console showed me the
following error:

Setting up update-notifier-common (3.168.4) ...
Traceback (most recent call last):
  File "/usr/lib/update-notifier/package-data-downloader", line 24, in <module>
    import debian.deb822
  File "/usr/lib/python3/dist-packages/debian/deb822.py", line 38, in <module>
    import chardet
ImportError: No module named 'chardet'
dpkg: error processing package update-notifier-common (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of update-notifier:
 update-notifier depends on update-notifier-common (= 3.168.4); however:
  Package update-notifier-common is not configured yet.

As a workaround installing chardet in Python3 using pip3 allowed the apt
upgrade to complete.

sudo pip3 install chardet.

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https://bugs.launchpad.net/bugs/1683925

Title:
  package update-notifier-common 3.168.4 failed to install/upgrade:
  package update-notifier-common is not ready for configuration  cannot
  configure (current status 'half-installed')

Status in update-notifier package in Ubuntu:
  Incomplete

Bug description:
  dpkg: error processing package ubuntu-release-upgrader-gtk
  (--configure): dependency problems - leaving unconfigured Errors were
  encountered while processing: update-notifier update-manager
  flashplugin-installer ubuntu-release-upgrader-gtk

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: update-notifier-common 3.168.4
  ProcVersionSignature: Ubuntu 4.4.0-72.93-generic 4.4.49
  Uname: Linux 4.4.0-72-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  Date: Tue Apr 18 21:23:18 2017
  ErrorMessage: package update-notifier-common is not ready for configuration  cannot configure (current status 'half-installed')
  InstallationDate: Installed on 2017-01-17 (91 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.1
   apt  1.2.19
  SourcePackage: update-notifier
  Title: package update-notifier-common 3.168.4 failed to install/upgrade: package update-notifier-common is not ready for configuration  cannot configure (current status 'half-installed')
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.apt.apt.conf.d.10periodic:
   APT::Periodic::Update-Package-Lists "0";
   APT::Periodic::Download-Upgradeable-Packages "0";
   APT::Periodic::AutocleanInterval "0";
   APT::Periodic::Unattended-Upgrade "1";
  mtime.conffile..etc.apt.apt.conf.d.10periodic: 2017-04-18T09:37:16.717221

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