[Bug 1729378] Re: impossible to upgrade ubuntu from 17.04 to 17.10

[Ubuntu Foundations Team Bug Bot]

** Tags added: zesty2artful

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https://bugs.launchpad.net/bugs/1729378

Title:
  impossible to upgrade ubuntu from 17.04 to 17.10

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

Bug description:
  after an 'apt dist-upgrade'
  and an 'do-release-upgrade' i get this error:

  
  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.

  
  probably my problem is one of the 3 listed but there is no help to solve the problem...

  many thanks,
    Michele

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: ubuntu-release-upgrader-core 1:17.04.10
  ProcVersionSignature: Ubuntu 4.10.0-37.41-generic 4.10.17
  Uname: Linux 4.10.0-37-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.4-0ubuntu4.5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Wed Nov  1 16:36:36 2017
  InstallationDate: Installed on 2017-07-03 (120 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to zesty on 2017-11-01 (0 days ago)

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