I'm seeing this too, with 1.0.11~git-20060105-2 (i.e. feisty). I strace'd mount(8), and see that mount prints that warning just after failing to locate the file /var/run/rpc.idmapd.pid. The warning seems to be spurious -- rpc.idmapd is running, and I'm seeing the correct owners on the mounted NFSv4 share.
Gustavo, do the files on your own NFS mount have the correct owners? Adding the --pidfile parameter to start-stop-daemon does make the error go away here, but it's necessary to pass --make-pidfile also. This used to work, though -- mount only printed the message when rpc.idmapd was in fact not running. I'm attaching a diff that demonstrates the change I made to /etc/init.d /nfs-common . ** Attachment added: "Ask start-stop-daemon to make a pidfile" http://librarian.launchpad.net/7034306/nfs-common.diff -- rpc.idmapd not working https://launchpad.net/bugs/87382 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs