[Bug 936870] Re: unattended upgrade failing due to incorrectly detected conffile prompt due to "newconffile" line

[Brian Murray]

On a 12.04.1 server system I installed unattended-upgrades version
0.76ubuntu1 from precise-proposed, ran unattended-upgrades and
successfully installed 31 updates without any issue.

** Tags removed: verification-needed
** Tags added: verification-done-precise

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Title:
  unattended upgrade failing due to incorrectly detected conffile prompt
  due to "newconffile" line

Status in “unattended-upgrades” package in Ubuntu:
  Fix Released
Status in “unattended-upgrades” source package in Lucid:
  Fix Released
Status in “unattended-upgrades” source package in Precise:
  Fix Committed

Bug description:
  [Impact]
  It is possible for unattended-upgrade to be unsuccessful when encountering some packages and conffiles in them.  However, manual installation of the packages is possible without encountering a conffile prompt.

  [Test Case]
  A specific package which creates this situation has not been found so a regression test of installing Precise / Lucid, then instal ling unattended-upgrades and running it manually (unattended-upgrade --debug) should be sufficient.

  [Regression Potential]
  This fix has been in quantal since June 2012 with no regressions reported.

  On severa hundredl of our Ubuntu machines, we have unattended upgrades
  active.  Over the weekend, this started reporting on all machines with
  dhcpcd installed that it could not upgrade that package due to a
  conffile prompt.  This looks very similar to #773007  and #336558,
  both of which are marked as fixed.

  On one of the machines, I've run unattended-upgrades --debug, and
  attached the output below.  The MD5 sums seem to match (which is a
  relief - I didn't think I was modifying these files), so I don't know
  why the conffile prompt is being detected.  If I run apt-get safe-
  upgrade on its own, it successfully upgrades the package with no
  prompting.

  ProblemType: BugDistroRelease: Ubuntu 10.04
  Package: unattended-upgrades 0.55ubuntu7
  ProcVersionSignature: Ubuntu 2.6.32-37.81-server 2.6.32.49+drm33.21
  Uname: Linux 2.6.32-37-server x86_64
  Architecture: amd64
  Date: Mon Feb 20 10:06:00 2012InstallationMedia: Ubuntu-Server 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.2)
  PackageArchitecture: all
  ProcEnviron:
   SHELL=/usr/local/bin/bash
   PATH=(custom, no user)
   LANG=en_GB.UTF-8SourcePackage: unattended-upgrades

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