Public bug reported: When trying to upgrade Ubuntu from 14.04 to 16.04, the upgrader errors out. Not sure why it's happening.
I am on Ubuntu 14.04.5 LTS I want to upgrade to 16.04 LTS To upgrade I ran the update from the UI first and when that didn't work I tried: 'sudo do-release-upgrade' from the terminal The last few lines in the terminal when it errors out are: Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Building data structures... Done Calculating the changes Calculating the changes Could not calculate the upgrade 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 1:0.220.9 ProcVersionSignature: Ubuntu 3.13.0-139.188-generic 3.13.11-ckt39 Uname: Linux 3.13.0-139-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.14.1-0ubuntu3.27 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: Unity Date: Wed Jan 17 16:37:30 2018 InstallationDate: Installed on 2012-04-28 (2090 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to trusty on 2018-01-17 (0 days ago) ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug dist-upgrade 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/1743895 Title: Ubuntu upgrade from 14.04 to 16.04 is having problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1743895/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs