Public bug reported: do-release-upgrade cannot calculate the upgrade, offers no useful insight as to why, and provides no way to see the actual underlying error.
==== Reading cache Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Hit http://us.archive.ubuntu.com/ubuntu bionic InRelease Hit http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease Hit http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease Hit http://security.ubuntu.com/ubuntu bionic-security InRelease Fetched 0 B in 0s (0 B/s) Reading package lists... Done Building dependency tree Reading state information... Done Updating repository information Hit http://security.ubuntu.com/ubuntu cosmic-security InRelease Hit http://us.archive.ubuntu.com/ubuntu cosmic InRelease Hit http://us.archive.ubuntu.com/ubuntu cosmic-updates InRelease Hit http://us.archive.ubuntu.com/ubuntu cosmic-backports InRelease Fetched 0 B in 0s (0 B/s) Checking package manager Reading package lists... Done Building dependency tree Reading state information... 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. Restoring original system state Aborting Reading package lists... Done Building dependency tree Reading state information... Done === Command terminated with exit status 1 (Thu Oct 18 21:53:52 2018) === ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.27 ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18 Uname: Linux 4.15.0-36-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: GNOME Date: Thu Oct 18 21:49:00 2018 InstallationDate: Installed on 2015-12-17 (1036 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to bionic on 2018-10-19 (0 days ago) mtime.conffile..etc.update-manager.release-upgrades: 2018-10-18T21:43:55.313922 ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic dist-upgrade wayland-session -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1798729 Title: release upgrade from 18.04 to 18.10 cannot calculate upgrade, no reason given To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1798729/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
