Public bug reported: 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://us.archive.ubuntu.com/ubuntu xenial InRelease Hit http://archive.canonical.com/ubuntu xenial InRelease Get:1 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] Ign http://dl.google.com/linux/chrome/deb stable InRelease Hit http://packages.ros.org/ros/ubuntu xenial InRelease Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] Get:3 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Hit http://dl.google.com/linux/chrome/deb stable Release 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://us.archive.ubuntu.com/ubuntu bionic InRelease Get:1 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB] Hit http://archive.canonical.com/ubuntu bionic InRelease Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB] Get:3 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB] Fetched 247 kB 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 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubuntu-release-upgrader-core 1:16.04.25 ProcVersionSignature: Ubuntu 4.4.0-135.161-generic 4.4.140 Uname: Linux 4.4.0-135-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: Unity Date: Sun Sep 23 05:06:59 2018 InstallationDate: Installed on 2016-06-18 (826 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to xenial on 2018-09-23 (0 days ago) ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug dist-upgrade xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1793938 Title: could not upgrade from 16.04 to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1793938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
