Public bug reported: Trying to upgrade 16.04.5 LTS to 18.04.1 LTS we get an error without any explanation:
(system is up to date, nothing to do in an apt update/dist-upgrade, and freshly rebooted) Reporting here with ubuntu-bug as advised by the error message Reading cache Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Hit http://fr.archive.ubuntu.com/ubuntu xenial InRelease Hit http://fr.archive.ubuntu.com/ubuntu xenial-updates InRelease Hit http://fr.archive.ubuntu.com/ubuntu xenial-backports InRelease Hit http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial InRelease Hit http://security.ubuntu.com/ubuntu xenial-security InRelease Hit http://archive.canonical.com/ubuntu xenial InRelease Fetched 0 B 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://fr.archive.ubuntu.com/ubuntu bionic InRelease Hit http://fr.archive.ubuntu.com/ubuntu bionic-updates InRelease Hit http://fr.archive.ubuntu.com/ubuntu bionic-backports InRelease Hit http://security.ubuntu.com/ubuntu bionic-security InRelease Hit http://archive.canonical.com/ubuntu bionic 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 (Mon Aug 20 17:45:23 2018) === ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubuntu-release-upgrader-core 1:16.04.25 ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134 Uname: Linux 4.4.0-133-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CrashDB: ubuntu Date: Mon Aug 20 17:37:15 2018 PackageArchitecture: all ProcEnviron: LD_LIBRARY_PATH=<set> TERM=xterm PATH=(custom, no user) LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to xenial on 2018-08-20 (0 days ago) ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug dist-upgrade third-party-packages xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1787979 Title: cannot 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/1787979/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
