Looks like problem of missing network interface. Full log of that booting attached.
** Attachment added: "krzk.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1950968/+attachment/5541152/+files/krzk.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1950968 Title: v5.15 RT kernel fails to boot on some arm64 instances To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1950968/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs