Public bug reported:
Trying to upgrade from 16.04 fails with the error:
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134
Uname: Linux 4.4.0-133-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Sun Aug 19 08:17:59 2018
InstallationDate: Installed on 2012-09-05 (2174 days ago)
InstallationMedia: Mythbuntu 12.04 "Precise Pangolin" - Release amd64 (20120425)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2018-08-19 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade xenial
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https://bugs.launchpad.net/bugs/1787819
Title:
LTS upgrade to 18.04.01 fails because it "could not calculate the
upgrade"
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