Public bug reported: At present using Ubuntu 14.04. When the software upgrade prompted that the new release 15.04 is available, I requested for the upgrade. After initial fetching of the files the following error message appeared "Calculating the changes Calculating the changes
and then says: 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 ubun... ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: ubuntu-release-upgrader-core 1:0.220.8 ProcVersionSignature: Ubuntu 3.13.0-74.118-generic 3.13.11-ckt30 Uname: Linux 3.13.0-74-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: Unity Date: Wed Jan 6 16:50:50 2016 InstallationDate: Installed on 2015-02-01 (339 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 2016-01-06 (0 days ago) VarLogDistupgradeTermlog: mtime.conffile..etc.update.manager.release.upgrades: 2016-01-02T16:16:30.094879 ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug dist-upgrade trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1531497 Title: unable to upgrade from ubuntu 14.04 to ubuntu 15.04 " unable to calculate upgrade" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1531497/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs