[Bug 1510841] Re: "Could not calculate the upgrade" due to multiple metapackages being installed

[Anke S]

I also experience a similar/the same problem for upgrading from 14.04 to xenial. Indeed I do for several months now, always hoping that the bug would be fixed one day...
This is what pops up (in the end) when I sudo do-release-upgrade
"
Calculating the changes

Could not determine 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. 
"
and here I am...

/var/log/dist-upgrade/apt.log tells me 
"Broken dpkg:amd64 Breaks on software-center [ amd64 ] < 13.10-0ubuntu4.2 > ( gnome ) (< 13.10-0ubuntu9~)
  Considering software-center:amd64 -1 as a solution to dpkg:amd64 5881
  Added software-center:amd64 to the remove list" followed by a long list of this kind of broken statements and finally
"Can't install 'xubuntu-core' "

excerpt from /var/log/dist-upgrade/main.log:
2017-02-23 07:27:05,447 DEBUG Comparing 4.4.0-64 with 3.13.0-110
2017-02-23 07:27:05,482 DEBUG metapkg 'xubuntu-desktop' installed but marked_delete
2017-02-23 07:27:05,482 DEBUG none of the '['ubuntu-desktop', 'kubuntu-desktop', 'xubuntu-core', 'xubuntu-desktop', 'ubuntustudio-desktop', 'mythbuntu-desktop', 'kubuntu-netbook', 'lubuntu-core', 'lubuntu-desktop', 'ubuntu-gnome-desktop', 'ubuntu-mate-core', 'ubuntu-mate-cloudtop', 'ubuntu-mate-desktop']' meta-pkgs installed
2017-02-23 07:27:05,482 DEBUG guessing 'xubuntu-core' as missing meta-pkg
2017-02-23 07:27:05,482 ERROR failed to mark 'xubuntu-core' for install ("The cache has no package named 'xubuntu-core'")
2017-02-23 07:27:05,507 DEBUG blacklist expr 'xubuntu-desktop' matches 'xubuntu-desktop'
2017-02-23 07:27:05,507 DEBUG The package 'xubuntu-desktop' is marked for removal but it's in the removal blacklist
2017-02-23 07:27:05,616 ERROR Dist-upgrade failed: 'The package 'xubuntu-desktop' is marked for removal but it is in the removal blacklist.'
2017-02-23 07:27:05,617 DEBUG abort called

I am certainly running xubuntu. And it works, so I suppose that all
necessary packages are installed. Unfortunately, just as for milvang, I
do not understand what I need to do to be able to do the upgrade anyway.
And I am not sure of the consequences if I remove xubuntu-desktop as
proposed by rmjpraakash...

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https://bugs.launchpad.net/bugs/1510841

Title:
  "Could not calculate the upgrade" due to multiple metapackages being
  installed

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

Bug description:
  Trying to upgrade from 15.04 to 15.10.
  Non-core ppas disabled.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: ubuntu-release-upgrader-core 1:15.04.14.2
  ProcVersionSignature: Ubuntu 3.19.0-31.36-generic 3.19.8-ckt7
  Uname: Linux 3.19.0-31-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.17.2-0ubuntu1.7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Wed Oct 28 10:53:56 2015
  InstallationDate: Installed on 2014-11-27 (334 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to vivid on 2015-10-28 (0 days ago)
  VarLogDistupgradeTermlog:

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