This problem is caused by the if-up.d script name change which occured between version 0.3-1 and 0.6-1. The previous one zeroconf-up is not deleted and causes problems with loopback interfaces.
** Bug 37490 has been marked a duplicate of this bug ** Changed in: zeroconf (Ubuntu) Status: Needs Info => In Progress -- Network startup locks during init https://launchpad.net/malone/bugs/6637 -- universe-bugs mailing list universe-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/universe-bugs