Public bug reported:
After running the command
sudo do-release-upgrade
I get the following error message
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
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-93.140-generic 3.13.11-ckt39
Uname: Linux 3.13.0-93-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Sat Aug 20 18:30:22 2016
InstallationDate: Installed on 2012-10-31 (1389 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64
(20120823.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-08-21 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade third-party-packages trusty
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https://bugs.launchpad.net/bugs/1615312
Title:
Can not upgrade from 14.04 to 16.04
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