[Bug 1787486] [NEW] Failure upgrading to 18.04 from 16.04.

[Dwight Irving]

Public bug reported:

It fails with possible reasons being the following:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unnofficial software packages not provided by Ubuntu. 

There are additional software packages not provided by ubuntu that are
installed on the system, but they have not blocked updates in the past.
Packages like Keepass, Dropbox, Crashplan,

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134
Uname: Linux 4.4.0-133-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
Date: Thu Aug 16 17:42:24 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-04-24 (1210 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2018-08-16 (0 days ago)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade third-party-packages xenial

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https://bugs.launchpad.net/bugs/1787486

Title:
  Failure upgrading to 18.04 from 16.04.

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  It fails with possible reasons being the following:
  * Upgrading to a pre-release version of Ubuntu
  * Running the current pre-release version of Ubuntu
  * Unnofficial software packages not provided by Ubuntu. 

  There are additional software packages not provided by ubuntu that are
  installed on the system, but they have not blocked updates in the
  past. Packages like Keepass, Dropbox, Crashplan,

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134
  Uname: Linux 4.4.0-133-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Thu Aug 16 17:42:24 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-04-24 (1210 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-08-16 (0 days ago)

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