Public bug reported:
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
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.18
ProcVersionSignature: Ubuntu 3.2.0-79.115-generic 3.2.67
Uname: Linux 3.2.0-79-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Tue Mar 24 22:43:30 2015
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2015-03-25 (0 days ago)
** Affects: update-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade precise running-unity
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https://bugs.launchpad.net/bugs/1436171
Title:
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 If none of this applies,
then please report this bug using the command 'ubuntu-bug ubuntu-
release-upgrader-core' in a terminal.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1436171/+subscriptions
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