Public bug reported: During the process of upgrade, I gave a message which tell me that an error occurred during the computation of the packet dependencies.
$ lsb_release -rd Description: Ubuntu 18.04.5 LTS Release: 18.04 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.38 ProcVersionSignature: Ubuntu 5.3.0-53.47~18.04.1-generic 5.3.18 Uname: Linux 5.3.0-53-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.17 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Mon Aug 31 16:13:32 2020 InstallationDate: Installed on 2020-03-09 (174 days ago) InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to bionic on 2020-08-31 (0 days ago) mtime.conffile..etc.update-manager.release-upgrades: 2020-08-31T15:20:48.778677 ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1893659 Title: Can't upgrade from 18.04 to 20.04 with 'do-release-upgrade' tool To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1893659/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs