In Feisty, Herd-5, I am affected by this when I use Network Manager ( network-admin gui) to change the interface from DHCP to static.
dhclient: There is already a pid file /var/run/dhclient.eth0.pid with pid 134993440 then avahi-daemon[4971]: Withdrawing address record for 192.168.0.40 on eth0 ** Changed in: ifupdown (Ubuntu) Status: Unconfirmed => Confirmed -- /etc/init.d/networking does not stop dhclient3 when changing from dhcp to static ip https://launchpad.net/bugs/88101 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs