Public bug reported:
After running sudo "do-release-upgrade -d" in the Terminal in an attempt
to upgrade from Trusty to Vivid, the process was cut short by the
following messages:
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Building data structures... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
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
ubuntu-release-upgrader-core:
Installed: 1:0.220.7
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.7
ProcVersionSignature: Ubuntu 3.19.0-28.30~14.04.1-generic 3.19.8-ckt5
Uname: Linux 3.19.0-28-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.13
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Fri Sep 11 12:58:19 2015
InstallationDate: Installed on 2015-08-25 (16 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2015-09-11 (0 days ago)
mtime.conffile..etc.update.manager.release.upgrades: 2015-09-11T12:27:52.718891
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade trusty
** Attachment added: "logs from /var/log/dist-upgrade/"
https://bugs.launchpad.net/bugs/1494853/+attachment/4461431/+files/dist-upgrade%20logs.zip
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https://bugs.launchpad.net/bugs/1494853
Title:
Crash on Ubuntu upgrade attempt from 14.04.3 LTS to newer version
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