Public bug reported: while upgrading 16.04 version to 18 it is showing "An unresolvable problem occurred while calculating the upgrade.
ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubuntu-release-upgrader-core 1:16.04.29 ProcVersionSignature: Ubuntu 4.15.0-99.100~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-99-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.23 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: Unity Date: Sat May 9 00:11:09 2020 InstallationDate: Installed on 2019-05-23 (351 days ago) InstallationMedia: Ubuntu 16.04.6 LTS "Xenial Xerus" - Release amd64 (20190227) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to xenial on 2020-05-08 (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/1877646 Title: cannot upgrade even after removing ppa To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1877646/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs