[Bug 1537199] Re: impossible to upgrade to 16.04 with sudo do-release-upgrade --devel-release

[Ubuntu Foundations Team Bug Bot]

** Tags added: trusty2xenial

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https://bugs.launchpad.net/bugs/1537199

Title:
  impossible to upgrade to 16.04 with sudo do-release-upgrade --devel-
  release

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

Bug description:
  Check of the administrator of packages
  Reading of the lists of packages … Ended
  Construction of the tree of dependences(outbuildings)
  Reading of the information of state … Ended
  Construction of the structures of data … Ended

  Calculation of the current modifications

  Calculation of the current modifications

  Impossible to estimate the upgrade

  An insoluble problem arose during the preparation of the upgrade.

  This maybe owed in:
  * The upgrade towards a version of development of Ubuntu;
  * The version of development of Ubuntu is at present used;
  * Unofficial software packages, not supplied by Ubuntu.

  If nothing of that kind does not apply, please indicate this bug by
  using the command(order) " ubuntu-bug ubuntu-release-upgrader-core "
  in a terminal.

  System restore in its home state

  Cancellation
  Reading of the lists of packages … Ended
  Construction of the tree of dependences(outbuildings)
  Reading of the information of state … Ended
  Construction of the structures of data … Ended

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8 [origin: unknown]
  ProcVersionSignature: Ubuntu 3.19.0-43.49~14.04.1-generic 3.19.8-ckt10
  Uname: Linux 3.19.0-43-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Jan 22 21:25:52 2016
  InstallationDate: Installed on 2015-11-22 (61 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-01-22 (0 days ago)

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