[Bug 1577115] [NEW] upgrade from xubuntu 14.04 to xubuntu 16.04 LTS failed

[Jacques]

Public bug reported:

i tried to upgrade from xubuntu 14.04 to 16.04 LTS. it complains about
3rd party software which cannot be upgraded.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.16.0-62.83~14.04.1-generic 3.16.7-ckt23
Uname: Linux 3.16.0-62-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Sun May  1 10:08:27 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-07-05 (300 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-05-01 (0 days ago)
VarLogDistupgradeTermlog:

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


** Tags: amd64 apport-bug dist-upgrade trusty

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https://bugs.launchpad.net/bugs/1577115

Title:
  upgrade from xubuntu 14.04 to xubuntu 16.04 LTS failed

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

Bug description:
  i tried to upgrade from xubuntu 14.04 to 16.04 LTS. it complains about
  3rd party software which cannot be upgraded.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.16.0-62.83~14.04.1-generic 3.16.7-ckt23
  Uname: Linux 3.16.0-62-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Sun May  1 10:08:27 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-05 (300 days ago)
  InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-05-01 (0 days ago)
  VarLogDistupgradeTermlog:

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