[Bug 1594233] Re: Cannot upgrade ubuntu from 14.04 LTS to 15.10 neither to 16.04 LTS

[Ads20000]

This shouldn't happen and I have no idea what's causing the bug. But if
you're still on Ubuntu 14.04 and haven't upgraded using a live USB/DVD,
could you please try running `sudo do-release-upgrade` and `sudo do-
release-upgrade -d` in Terminal and advise as to the results? Don't use
the `-d` flag if you're on 16.04, because that will upgrade you to
Ubuntu Yakkety (the development release), but sometimes it helps if you
use that when trying to upgrade to 16.04.

If that works, then hopefully the logs you've got in the bug report
there will be enough for the developers to fix the original bug.

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https://bugs.launchpad.net/bugs/1594233

Title:
  Cannot upgrade ubuntu from 14.04 LTS to 15.10 neither to 16.04 LTS

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

Bug description:
  I cannot upgrade ubuntu from 14.04 LTS to 15.10 neither to 16.04 LTS.

  Everytime I get the following error message:

  "Impossibile calcolare l'avanzamento

  Si è verificato un problema irrisolvibile durante il calcolo 
  dell'avanzamento. 

  I motivi possono essere: 
  * L'avanzamento a una versione di pre-rilascio di Ubuntu 
  * L'esecuzione dell'attuale versione di pre-rilascio di Ubuntu 
  * Pacchetti software non ufficiali non forniti da Ubuntu 

  Se non vengono installati, segnalare il problema usando il comando 
  «ubuntu-bug ubuntu-release-upgrader-core» in un terminale. "

  "That for the English version stands for:

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

   This can be caused by:
   * Upgrading to a pre-release version of Ubuntu
   * Running the current pre-release version of Ubuntu
   * Unofficial software packages not provided by Ubuntu

  If none of this applies, then please report this bug using the command
  'ubuntu-bug ubuntu-release-upgrader-core' in a terminal"

  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-88.135-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-88-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sun Jun 19 22:56:49 2016
  InstallationDate: Installed on 2012-03-25 (1547 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-06-20 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-06-19T21:14:43.760286

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