Public bug reported: I updated 13.10 fully and then rebooted.
I then launched the software updater. On launching updater I am offered upgrade from 13.10 to 14.04. The release tool starts successfully. I receive a warning message: "Third party sources disabled. Some third party entries in your sources.list were disabled. You can re-enable them after the upgrade with the 'software-properties' tool or your package manager." I clicked the Close button. The release tool then began fetching files. Before this is complete the upgrader stops with the following failure message: 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 am running the released version of 13.10. I am not upgrading to a pre-release version of 14.04 - at least not knowingly. I don't think I have any unofficial software packages (but how would I find out?). I consider this a bug as the upgrader does not provide any way forward (such as identifying how to tell what the problem is; or even offering to solve it). Regards Springnuts. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: ubuntu-release-upgrader-core 1:0.205.5 ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5 Uname: Linux 3.11.0-19-generic i686 NonfreeKernelModules: nvidia ApportVersion: 2.12.5-0ubuntu2.2 Architecture: i386 CrashDB: ubuntu Date: Fri Apr 18 07:31:23 2014 InstallationDate: Installed on 2014-02-15 (61 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1) MarkForUpload: True PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to saucy on 2014-04-18 (0 days ago) VarLogDistupgradeTermlog: ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug dist-upgrade i386 saucy 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/1309358 Title: upgrade fail 13.10 - 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1309358/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs