In the initramfs; if an ip= command exists in the kernel command-line, a netplan configuration will be written. I would expect this is a requirement anyway if you want to use nfsroot=.
I certainly don't expect this to have changed at all in the recent updates; we've been writing a netplan configuration in /run for a while. One change, however, might be a dropped patch in NetworkManager to take into account further files written in /run/NetworkManager by netplan. In short; the expected behavior is: - boot off the network, initramfs configures network (via dhcp or an assigned IP via command-line) - network config (dhcp or manual) is captured in /run/netplan/<interface>.yaml, so it's propagated to the running system after initramfs is done and we switch to the real root. - networkd configures the network (well, keeps it up with the same config as in the initramfs). This part isn't selectable, but NetworkManager should explicitly ignore the interface as externally managed. I think there is some further complication in that you're also writing /etc/network/interfaces, but the config provided does not look at fault. Please file a separate bug; include /run/netplan and /run/NetworkManager after the system has booted, along with the contents of /var/log/syslog. If possible, stop NetworkManager and restart it with "/usr/sbin/NetworkManager --log-level=DEBUG -n" and include this debug output. To be clear, I don't think this would be a regression caused by the netplan update. The only change is essentially to configure interfaces as soon as they appear in yaml (even if no IP is configured), which wouldn't cause a difference from the current initramfs behavior (where the file is statically written and includes IP config). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763608 Title: Netplan ignores Interfaces without IP Addresses To manage notifications about this bug go to: https://bugs.launchpad.net/netplan/+bug/1763608/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
