[Bug 1577006] Re: Unable to upgrade Ubuntu to 16.04 version from 15.10

[Marian Krause]

** Attachment added: "log with information about dependiency problems during upgrade 15.10->16.04"
   https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1577006/+attachment/4661299/+files/apt.log.gz

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https://bugs.launchpad.net/bugs/1577006

Title:
  Unable to upgrade Ubuntu to 16.04 version from 15.10

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

Bug description:
  System:
      Ubuntu 15.10 64 bits.
      Linux castarco-desktop 4.2.0-35-generic #40-Ubuntu SMP Tue Mar 15 22:15:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

  As an extra note, I'm using the privative Nvidia drivers provided by
  Ubuntu (not the ones provided by the NVIDIA webpage).

  The upgrade manager is telling me that it can't upgrade my system to
  Ubuntu 16.04, but it does not tell me what's the concrete problem,
  this is too vague (this is a Spanish message that appears after
  computing the needed changes):

      Eso se ha podido causar por: 
      * Actualizar a una versión de Ubuntu aún no publicada 
      * Estar ejecutando la versión actual, aún no publicada, de Ubuntu 
      * Paquetes no oficiales de software no proporcionados por Ubuntu 
      
      Si nada de esto aplica, informe de este error usando la orden 
      «ubuntu-bug ubuntu-release-upgrader-core» en una terminal.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ubuntu-release-upgrader-core 1:15.10.14.4
  ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
  Uname: Linux 4.2.0-35-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sat Apr 30 18:08:48 2016
  InstallationDate: Installed on 2015-09-03 (240 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=es_ES
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=es_ES.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to wily on 2016-04-30 (0 days ago)

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