Hi @racb, I have tested:
libvirt-daemon-system: Installed: 6.0.0-0ubuntu8.11 Candidate: 6.0.0-0ubuntu8.11 Version table: *** 6.0.0-0ubuntu8.11 500 500 http://archive.ubuntu.com/ubuntu focal-proposed/main amd64 Packages 100 /var/lib/dpkg/status As per the test plan. This package fixed the bug for me. ** Tags removed: verification-needed-focal ** Tags added: verification-done-focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906266 Title: After upgrade: "libvirt.libvirtError: Requested operation is not valid: format of backing image %s of image %s was not specified" To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1906266/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs