[Bug 1726073] Re: Failed upgrade to Zesty - Could not calculate the upgrade

[Brian Murray]

*** This bug is a duplicate of bug 1726180 ***
    https://bugs.launchpad.net/bugs/1726180

** This bug has been marked a duplicate of bug 1726180
   Unable to run do-release-upgrade

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https://bugs.launchpad.net/bugs/1726073

Title:
  Failed upgrade to Zesty - Could not calculate the upgrade

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

Bug description:
  Trying to upgrade from 17.04 to 17.10, I am getting the message "Could
  not calculate the upgrade".

  I have seen the bug https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1069160 which seems similar, but refers to earlier releases (and is marked as invalid), so I am reporting a fresh bug.   Bug 1069160 was resolved by a couple of people by removing xserver-xorg-video-nouveau,
  which I also have installed, but attempting to remove this will also remove xserver-xorg-video-all, and then makes a whole list of xserver-xorg-packages "no longer required", including the one for my graphics card - so I am reluctant to remove this package.

  I cannot work out whether I have unsupported packages which are
  preventing calculation of the upgrade (I had a look through the
  apt.log but couldn't work out where the error was).

  Thanks in advance for your help.   I've attached the apt.log file, and
  will attach the main.log file in a comment.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: ubuntu-release-upgrader-core 1:17.04.10
  ProcVersionSignature: Ubuntu 4.10.0-38.42-generic 4.10.17
  Uname: Linux 4.10.0-38-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4.5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity:Unity7
  Date: Sun Oct 22 17:25:42 2017
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to zesty on 2017-10-22 (0 days ago)
  VarLogDistupgradeTermlog:

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