[Bug 1561195] Re: unattended-upgrades not work in Ubuntu 16.04

[corrado venturini]

according doc
After installing Ubuntu 16.04, apt update and apt upgrade will run on boot and every day at 6:00 and 18:00 automatically.
And only security upgrade will be applied.
Now in 'Software & Updates' I have 'Download and install...' for security updates but I see some security updates waiting for my confirm. see screenshot.
I attached also some log.
I opened also another bug for the same problem: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1666225 

** Attachment added: "Screenshot and logs"
   https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1561195/+attachment/4833057/+files/UnattendedUpgrades.tar.gz

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https://bugs.launchpad.net/bugs/1561195

Title:
  unattended-upgrades not work in Ubuntu 16.04

Status in unattended-upgrades package in Ubuntu:
  Fix Released

Bug description:
  This guide've used successfully in Ubuntu 14.04 but something is not
  working in Ubuntu 16.04:

  https://help.ubuntu.com/lts/serverguide/automatic-updates.html

  I detected packages that need to be updated and the log of the
  application appears:

  No packages found that can be upgraded unattended and no pending auto-
  removals

  It never updated one by unattended-upgrades package for weeks that I
  have daily updated manually development version.

  It is necessary that application to run on other machines I need to
  upgrade within a month with the stable version. Thank you.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: unattended-upgrades 0.90
  ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6
  Uname: Linux 4.4.0-15-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Mar 23 15:46:21 2016
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=es_EC:es
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=es_EC.UTF-8
   SHELL=/bin/bash
  SourcePackage: unattended-upgrades
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.apt.apt.conf.d.10periodic: 2016-01-26T23:01:12.880608

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