Public bug reported: this is the report i get when trying to upgrade although none of the list is relevant.
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 14.04 Package: ubuntu-release-upgrader-core 1:0.220.8 ProcVersionSignature: Ubuntu 3.13.0-73.116-generic 3.13.11-ckt30 Uname: Linux 3.13.0-73-generic i686 ApportVersion: 2.14.1-0ubuntu3.19 Architecture: i386 CrashDB: ubuntu CurrentDesktop: Unity Date: Fri Dec 18 14:34:45 2015 EcryptfsInUse: Yes PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: dist-upgrade UpgradeStatus: Upgraded to trusty on 2015-12-17 (0 days ago) VarLogDistupgradeTermlog: mtime.conffile..etc.update.manager.release.upgrades: 2015-12-14T17:41:28.668440 ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug dist-upgrade i386 third-party-packages trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1527639 Title: ubuntu 14.04 wont upgrade to 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1527639/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs