Thanks, that helped a lot. I was able to track this down to a combination of statd (which I already suspected) and idmapd (which I should have remembered from recent changes to the upstart jobs, but had forgotten about).
Changing statd to start on virtual-filesystems, and changing idmapd to not block the / mountpoint, gets us clear of the boot hang. This is not a perfect fix because it means that anyone trying to do nfsroot over nfsv4 is out of luck; but it's strictly an improvement over the status quo, and it's been suggested that nfsroot doesn't actually work on nfsv4, so I'll go ahead with it for now. ** Changed in: mountall (Ubuntu Precise) Status: Incomplete => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/537133 Title: mountall issues with NFS root filesystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mountall/+bug/537133/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs