I did some retries with bigger guests (slower) and such. But all worked. Attached an example of such a reboot cycle (main console). You see shutdown waiting with FS unmount about 2 minutes for libvirt-guests suspend. Then on reboot it clearly is after FS mounts are up and therefore is able to find and start the guest.
** Attachment added: "reboot.log" https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1832859/+attachment/5271169/+files/reboot.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1832859 Title: during shutdown libvirt-guests gets stopped after file system unmount To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1832859/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
