[Bug 1510016] Re: Cannot upgrade to Ubuntu 15.10 (Could not calculate the upgrade)

[Jose Gómez]

After much testing, I ended up uninstalling all the "foreign" packages
in /var/log/dist-upgrade/main.log and the update is in progress now. I'd
say it was cinnamon what was preventing the upgrade.

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https://bugs.launchpad.net/bugs/1510016

Title:
  Cannot upgrade to Ubuntu 15.10 (Could not calculate the upgrade)

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

Bug description:
  I have Ubuntu 15.04 installed, with three PPAs enabled (Cinnamon
  Stable, Oracle Java and Google's tlk plugin).

  I tried to upgrade to Ubuntu 15.10, and during the upgrade process I
  got the "Could not calculate the upgrade" error. Disabling the PPAs
  didn't help.

  Looking into /var/log/dist-upgrade/main.log I saw an error with the
  package unity. As I use cinnamon as my DM, I just uninstalled unity.
  But now there is a similar error with update-manager, which I cannot
  uninstall, as I need that one for the upgrade.

  This is the current error shown:

  2015-10-26 10:45:12,421 ERROR Dist-upgrade failed: 'The package
  'update-manager' is marked for removal but it is in the removal
  blacklist.'

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: ubuntu-release-upgrader-core 1:15.04.14.2
  Uname: Linux 4.0.4-040004-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: X-Cinnamon
  Date: Mon Oct 26 10:45:09 2015
  InstallationDate: Installed on 2014-02-15 (617 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140203)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to vivid on 2015-10-26 (0 days ago)
  VarLogDistupgradeTermlog:

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