Public bug reported: This is a fairly vanilla desktop workstation. I've got a lot of -dev packages installed, and some external repos which I had to disable first (e.g openscad, kicad) but nothing particularly weird.
ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.42 ProcVersionSignature: Ubuntu 4.15.0-141.145-generic 4.15.18 Uname: Linux 4.15.0-141-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.23 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: XFCE Date: Wed Apr 14 17:37:40 2021 InstallationDate: Installed on 2015-03-09 (2228 days ago) InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to bionic on 2021-04-15 (0 days ago) ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic dist-upgrade -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924192 Title: Distribution upgrade (from 18.04 to 20.04) fails on "Calculating Upgrade" with no action-step suggestions other than filing a bug report. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1924192/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs