Public bug reported:
Straightforward upgrade. 14.04LTS desktop system (x86-64) was in a valid
state, with updating working and all updates applied. Answered "Yes" to
the prompt to upgrade to 16.04 LTS. Let that run. Failed with dialog
box "Could not calculate the upgrade", with no additional useful
information.
Looking at the logs shows a huge number of "Broken" packages, many of
which are internal to Ubuntu, so that's not helpful.
Did the "ubuntu-bug ubuntu-release-upgrader-core" thing to create this
bug report, so the detailed logs should be attached.
(There's a vast amount of contradictory advice on line at "askubuntu"
about this, with no good, non-drastic answers. This should Just Work.)
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-100.147-generic 3.13.11-ckt39
Uname: Linux 3.13.0-100-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat Oct 29 16:13:04 2016
InstallationDate: Installed on 2013-07-03 (1214 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 2016-10-29 (0 days ago)
VarLogDistupgradeTermlog:
** 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/1637781
Title:
Upgrade from 14.04 LTS to 16.04 LTS fails
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