Here is command line output - both desktop and command line both failed with same error
---------------------------------------------- bamboo@ubuntu ~ $ sudo do-release-upgrade Checking for a new Ubuntu release Get:1 Upgrade tool signature [819 B] Get:2 Upgrade tool [1,258 kB] Fetched 1,259 kB in 0s (0 B/s) authenticate 'bionic.tar.gz' against 'bionic.tar.gz.gpg' extracting 'bionic.tar.gz' Reading cache Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Hit http://ppa.launchpad.net/certbot/certbot/ubuntu xenial InRelease Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] Hit http://gb.archive.ubuntu.com/ubuntu xenial InRelease Get:2 http://gb.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] Hit http://ppa.launchpad.net/ondrej/php/ubuntu xenial InRelease Get:3 http://gb.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Fetched 323 kB in 0s (0 B/s) Reading package lists... Done Building dependency tree Reading state information... Done Updating repository information 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. To continue please press [ENTER] Hit http://gb.archive.ubuntu.com/ubuntu bionic InRelease Hit http://gb.archive.ubuntu.com/ubuntu bionic-updates InRelease Hit http://security.ubuntu.com/ubuntu bionic-security InRelease Hit http://gb.archive.ubuntu.com/ubuntu bionic-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 determine 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 ** Summary changed: - upgrade to 18.01 crashes + upgrade to 18.01 crashes - Could not determine the upgrade ** Summary changed: - upgrade to 18.01 crashes - Could not determine the upgrade + upgrade to 16.04 to 18.01 fails - Could not determine the upgrade -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1795872 Title: upgrade to 16.04 to 18.01 fails - Could not determine the upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1795872/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
