Public bug reported: Follow-up from Bug #1824680
I am unable to start the upgrade process from 14.04 to 16.04. "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." I have never used a pre-release of Ubuntu but I may have installed packages not provided by Ubuntu. I've got some PPAs activated, mainly to get a more recent version of Ardour and Jack. How can I resolve this problem and upgrade to the next release? Is there a way around installing from scratch? ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: ubuntu-release-upgrader-core 1:0.220.10 ProcVersionSignature: Ubuntu 3.13.0-168.218-generic 3.13.11-ckt39 Uname: Linux 3.13.0-168-generic i686 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.29 Architecture: i386 CrashDB: ubuntu CurrentDesktop: Unity Date: Fri Apr 19 20:42:24 2019 InstallationDate: Installed on 2012-05-19 (2526 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to trusty on 2019-04-15 (3 days ago) VarLogDistupgradeTermlog: ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug dist-upgrade i386 trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825564 Title: Can’t upgrade from 14.04 to 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1825564/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs