Comment 8 for bug 16380

I dist-upgraded yesterday to breezy and have the same problem (being forced to use pppoeconf after reboot).

/var/log/syslog says (when booting):
Oct 1 07:49:17 localhost pppd[14127]: Plugin rp-pppoe.so loaded.
Oct 1 07:49:17 localhost pppd[14129]: pppd 2.4.3 started by root, uid 0
Oct 1 07:49:17 localhost pppd[14129]: sendPacket: send: Network is down
Oct 1 07:49:17 localhost pppd[14129]: Exit.

I'm using pppoeconf_1.8ubuntu1_all.deb.

Unfortunately every run of pppoeconf adds an additional entry to /etc/network/interfaces:

------------------------------------------------------------------------
$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
        script grep
        map eth0
        map eth1

auto dsl-provider
iface dsl-provider inet ppp
provider dsl-provider

auto eth0
    iface eth0 inet manual
auto eth1
    iface eth1 inet manual

auto eth0

    iface eth0 inet manual

auto eth0

    iface eth0 inet manual
------------------------------------------------------------------------
(the last 7 lines [including blank ones] have been added by pppoeconf from 2 times being run).