[Bug 1548055] Re: Can't upgrade from Trusty To Xenial with "Can't calculate the upgrade" error

[Ubuntu Foundations Team Bug Bot]

*** This bug is a duplicate of bug 1279762 ***
    https://bugs.launchpad.net/bugs/1279762

You seem to have installed the cinnamon package on Ubuntu 13.10.
Unfortunately, that package is not available yet for 14.04. To upgrade
to Ubuntu 14.04 LTS you'll need to either wait for a fix for cinnamon to
be available or uninstall the package and then upgrade.

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inappropriately; please just reply to this message indicating so.]

** Tags added: cinnamon

** This bug has been marked a duplicate of bug 1279762
   upgrade to 14.04 from 13.10 or 12.04 failed - cinnamon fails to upgrade

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1548055

Title:
  Can't upgrade from Trusty To Xenial with "Can't calculate the upgrade"
  error

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

Bug description:
  when I tried to initiate the do-release-upgrade -d command, after calculating the upgrade -2.2 gb of downloads- It begin to download the packages. I had to leave the office so I disconnected the network first. it start to loop through the repositories and then reset the upgrade process and left safely so I turned off the laptop.
  then I tried to do that again in my house to be faced with "cannot calculate the upgrade" error. no matter what I do it just pops up over and over again.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
  Uname: Linux 3.19.0-49-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sun Feb 21 13:54:24 2016
  InstallationDate: Installed on 2015-10-01 (143 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-02-21 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2016-02-21 13:50:37.188988
   Log time: 2016-02-21 13:53:18.868511
   Log time: 2016-02-21 13:54:23.467569
   Log time: 2016-02-21 13:54:43.313736

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