Comment 8 for bug 1167337

> So an other possibility is, that longer delay of dhcpclient cause the problem
> for mounting the nfs-fs.

The handling of both ifupdown and network-manager is designed such that the interface should not be considered 'up' until dhclient succeeds. If 'sudo initctl list' is showing the interface as up in this case, then that's a bug; more likely, however, the interface is either still waiting for a dhcp answer or is considered failed, and bringing up the interface will bring up the NFS mounts as well. Either way, that's obviously not a bug in the NFS packages, since if the network has no address NFS can't work.

> Is there a possibility to restart dhcpclient in case of a unsuccessful
> inquiry.

"ifdown eth0; ifup eth0"

Please let us know if you find that the new version of the upstart jobs solves the nfs problem (but not the network problem, obviously). If it does, that strengthens the argument for pushing this fix as a stable release update to 12.04.