Public bug reported: The error message is:
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 I have upgraded my xubuntu before use the command sudo update-manager -d ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: update-manager 1:0.156.14.17 ProcVersionSignature: Ubuntu 3.2.0-67.101-generic 3.2.60 Uname: Linux 3.2.0-67-generic i686 NonfreeKernelModules: wl ApportVersion: 2.0.1-0ubuntu17.6 Architecture: i386 Date: Sat Aug 2 19:44:26 2014 GsettingsChanges: com.ubuntu.update-manager first-run false com.ubuntu.update-manager launch-time 1407001032 com.ubuntu.update-manager show-details true com.ubuntu.update-manager window-height 527 com.ubuntu.update-manager window-width 600 InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012) MarkForUpload: True PackageArchitecture: all ProcEnviron: LANGUAGE=it:en TERM=xterm PATH=(custom, no user) LANG=it_IT.UTF-8 SHELL=/bin/bash SourcePackage: update-manager Symptom: ubuntu-release-upgrader-core UpgradeStatus: Upgraded to precise on 2014-08-02 (0 days ago) VarLogDistupgradeTermlog: ** Affects: update-manager (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug dist-upgrade i386 precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1351654 Title: The release upgrade process (command: sudo update-manager -d) doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1351654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs