Public bug reported:
I run:
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install update-manager-core
sudo do-release-upgrade -d
throws error:
'calculating measure changes
Could not calculate the upgrade
An unsolvable problem occurred while calculating the upgrade.
Possible causes are:
* An update to a version pre-release of Ubuntu;
* Run from a pre-release version of Ubuntu;
* Use of unofficial packages not provided by Ubuntu; '
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-86.130-generic 3.13.11-ckt39
Uname: Linux 3.13.0-86-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.20
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue Apr 26 21:43:01 2016
InstallationDate: Installed on 2015-04-13 (379 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-04-27 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade trusty
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https://bugs.launchpad.net/bugs/1575440
Title:
Ubuntu 14.04 upgrade to 16.04
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