Public bug reported:
The release upgrade fails with the following message.
---
Could not determine 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
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Detailed logs attached.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
Uname: Linux 4.2.3-040203-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat Nov 21 15:28:39 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-12-10 (346 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 2015-11-21 (0 days ago)
VarLogDistupgradeTermlog:
mtime.conffile..etc.update.manager.release.upgrades: 2015-11-21T15:10:16.895504
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade third-party-packages trusty
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1518573
Title:
Failed to upgrade from 14.04 to 15.04
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