This looks like an issue with resolvconf not being integrated with the Ubuntu event-driven boot, not with ifupdown not integrating properly with udev. Indeed, ifupdown now hooks into upstart instead of into udev, but I don't imagine this has fixed your problem.
This looks like an issue with resolvconf not being integrated with the Ubuntu event-driven boot, not with ifupdown not integrating properly with udev. Indeed, ifupdown now hooks into upstart instead of into udev, but I don't imagine this has fixed your problem.