Public bug reported:
maybe is not a problem due to update manager. By typying
sudo kubuntu-devel-release-upgrade
it is not able to update. It states
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
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.13
ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55
Uname: Linux 3.2.0-60-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Fri Apr 18 14:17:34 2014
GsettingsChanges: com.ubuntu.update-manager launch-time 1397823246
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120423)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
LANGUAGE=
TERM=xterm
PATH=(custom, no user)
LANG=it_IT.UTF-8
SHELL=/bin/tcsh
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2014-04-18 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: update-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade precise
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https://bugs.launchpad.net/bugs/1309499
Title:
Upgrade from 12.04 to 14.04 doesn't work
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