@ sil2100: Yes, that's what I did - I used proposed and indicated it by the following kernel arg (mentioned above): apt-setup/proposed=true
Since I still have the systems up and running, here are more detailed apt outputs (for all 3 affected releases): ubuntu@hwe0007:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 19.04 Release: 19.04 Codename: disco ubuntu@hwe0007:~$ apt-cache policy netplan.ionetplan.io: Installed: 0.97-0ubuntu1~19.04.1 Candidate: 0.97-0ubuntu1~19.04.1 Version table: *** 0.97-0ubuntu1~19.04.1 500 500 http://us.ports.ubuntu.com/ubuntu-ports disco-proposed/main s390x Packages 100 /var/lib/dpkg/status 0.96-0ubuntu4.1 500 500 http://us.ports.ubuntu.com/ubuntu-ports disco-updates/main s390x Packages 0.96-0ubuntu4 500 500 http://us.ports.ubuntu.com/ubuntu-ports disco/main s390x Packages ubuntu@hwe0006:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.10 Release: 18.10 Codename: cosmic ubuntu@hwe0006:~$ apt-cache policy netplan.io netplan.io: Installed: 0.97-0ubuntu1~18.10.1 Candidate: 0.97-0ubuntu1~18.10.1 Version table: *** 0.97-0ubuntu1~18.10.1 500 500 http://us.ports.ubuntu.com/ubuntu-ports cosmic-proposed/main s390x Packages 100 /var/lib/dpkg/status 0.96-0ubuntu0.18.10.3 500 500 http://us.ports.ubuntu.com/ubuntu-ports cosmic-updates/main s390x Packages 0.40.2 500 500 http://us.ports.ubuntu.com/ubuntu-ports cosmic/main s390x Packages ubuntu@hwe0005:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.2 LTS Release: 18.04 Codename: bionic ubuntu@hwe0005:~$ apt-cache policy netplan.io netplan.io: Installed: 0.97-0ubuntu1~18.04.1 Candidate: 0.97-0ubuntu1~18.04.1 Version table: *** 0.97-0ubuntu1~18.04.1 500 500 http://us.ports.ubuntu.com/ubuntu-ports bionic-proposed/main s390x Packages 100 /var/lib/dpkg/status 0.96-0ubuntu0.18.04.4 500 500 http://us.ports.ubuntu.com/ubuntu-ports bionic-updates/main s390x Packages 0.40.1~18.04.4 500 500 http://ports.ubuntu.com/ubuntu-ports bionic-security/main s390x Packages 0.36.1 500 500 http://us.ports.ubuntu.com/ubuntu-ports bionic/main s390x Packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1821867 Title: network interface is down after post-install reboot of a default disco installation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1821867/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs