Public bug reported: I removed all PPAs with ppa-purge, as well as (hopefully) all packages created by myself.
1) Ubuntu release: lsb_release -rd Description: Ubuntu 18.04.5 LTS Release: 18.04 2)Package version ubuntu-release-upgrader-core 1:18.04.40 3) Obviously I expected an upgrade to 20.04 4) Instead the upgrade process stopped with an error, telling me that the program was not able to determine which system upgrade was available, and that an unsolvable problem occurred - without further informations what the cause of the problem could be. It asks me to file this bug report. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.40 ProcVersionSignature: Ubuntu 5.4.0-52.57~18.04.1-generic 5.4.65 Uname: Linux 5.4.0-52-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.18 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Tue Oct 27 18:59:02 2020 PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to bionic on 2020-10-27 (0 days ago) VarLogDistupgradeTermlog: ** 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/1901747 Title: Update from 18.04 to 20.04 not possible To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1901747/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs