Comment 24 for bug 859075

It's an NFS umount issue.

I've now tried using Natty's umountnfs.sh, but there's no difference, and
I've also tried altering fstab to use an IP address rather than a name. No
difference to the failure.

The immediate shutdown inconsistency is because the NFS mount hasn't yet
happened, triggered by networkmanager. As soon as NFS is mounted, the
system will not shut down.

Conversely, if I unmount NFS manually before trying to shut down, shutdown works correctly every time.

So I do not believe this has anything to do with the halt command.

It would be interesting to know if others with this problem also use NFS
mounts.

S