Public bug reported: An error occur while upgrading from Ubuntu 12.04 to 14.04. Here is the message:
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 1:0.156.14.19 ProcVersionSignature: Ubuntu 3.13.0-66.108~precise1-generic 3.13.11-ckt27 Uname: Linux 3.13.0-66-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.0.1-0ubuntu17.13 Architecture: amd64 Date: Fri Oct 30 21:23:37 2015 GsettingsChanges: com.ubuntu.update-manager check-new-release-ignore 'trusty' com.ubuntu.update-manager first-run false com.ubuntu.update-manager launch-time 1446236488 com.ubuntu.update-manager window-height 500 com.ubuntu.update-manager window-width 600 InstallationMedia: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204) MarkForUpload: True PackageArchitecture: all ProcEnviron: LANGUAGE=en_US:en 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 2015-10-30 (0 days ago) VarLogDistupgradeTermlog: ** Affects: update-manager (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug dist-upgrade precise running-unity third-party-packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1511847 Title: Upgrading from Ubuntu 12.04 to Ubuntu 14.04 does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1511847/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs