[Bug 1573003] [NEW] Software Updater (update-manager) window goes away, updates are not installed

[FernanAguero]

Public bug reported:

This problem started some weeks or months ago, I can never install
updates running the 'Software Updater' (update-manager). The updater
launches OK, it checks for updates correctly, but upon clicking the
'Install Now' button, a brief message reads "waiting for authentication"
and then the window goes away, and no updates are installed.

Running the update-manager from a terminal does not produce any errors
or warnings. Everything happens as explained above, and the program
silently fails to install updates.

However, running apt-get update + apt-get upgrade works perfectly from
the terminal.

The problem is similar to the one reported here, 
https://askubuntu.com/questions/546363/software-updater-software-updates-not-working-on-14-04-lts

but the solution suggested (installing a threading.py file) does not
work for me. I have already a threading.py file in my /usr/lib/python3.4
directory, but replacing it with a newer version from
https://hg.python.org/cpython/file/3.4/Lib/threading.py did not fix the
issue.

Please help me debug further or point me to a solution.


lsb_release -rd
Description:	Ubuntu 14.04.4 LTS
Release:	14.04


apt-cache policy update-manager 
update-manager:
  Installed: 1:0.196.14
  Candidate: 1:0.196.14
  Version table:
 *** 1:0.196.14 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:0.196.11 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: update-manager 1:0.196.14
ProcVersionSignature: Ubuntu 3.13.0-83.127-generic 3.13.11-ckt35
Uname: Linux 3.13.0-83-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Apr 21 09:07:37 2016
InstallationDate: Installed on 2012-10-29 (1269 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to trusty on 2014-11-25 (512 days ago)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug third-party-packages trusty

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https://bugs.launchpad.net/bugs/1573003

Title:
  Software Updater (update-manager) window goes away, updates are not
  installed

Status in update-manager package in Ubuntu:
  New

Bug description:
  This problem started some weeks or months ago, I can never install
  updates running the 'Software Updater' (update-manager). The updater
  launches OK, it checks for updates correctly, but upon clicking the
  'Install Now' button, a brief message reads "waiting for
  authentication" and then the window goes away, and no updates are
  installed.

  Running the update-manager from a terminal does not produce any errors
  or warnings. Everything happens as explained above, and the program
  silently fails to install updates.

  However, running apt-get update + apt-get upgrade works perfectly from
  the terminal.

  The problem is similar to the one reported here, 
  https://askubuntu.com/questions/546363/software-updater-software-updates-not-working-on-14-04-lts

  but the solution suggested (installing a threading.py file) does not
  work for me. I have already a threading.py file in my
  /usr/lib/python3.4 directory, but replacing it with a newer version
  from https://hg.python.org/cpython/file/3.4/Lib/threading.py did not
  fix the issue.

  Please help me debug further or point me to a solution.

  
  lsb_release -rd
  Description:	Ubuntu 14.04.4 LTS
  Release:	14.04

  
  apt-cache policy update-manager 
  update-manager:
    Installed: 1:0.196.14
    Candidate: 1:0.196.14
    Version table:
   *** 1:0.196.14 0
          500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1:0.196.11 0
          500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: update-manager 1:0.196.14
  ProcVersionSignature: Ubuntu 3.13.0-83.127-generic 3.13.11-ckt35
  Uname: Linux 3.13.0-83-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Apr 21 09:07:37 2016
  InstallationDate: Installed on 2012-10-29 (1269 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to trusty on 2014-11-25 (512 days ago)

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