Comment 1 for bug 379914

Same here on a ubuntu 9.04 Ubuntu 32 bits user must do all the time sudo pppoeconf to get internet access...

pppoeconf:
  Installato: 1.18ubuntu1
  Candidato: 1.18ubuntu1
  Tabella versione:
 *** 1.18ubuntu1 0
        500 http://archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

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

auto dsl-provider
iface dsl-provider inet ppp
pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf
provider dsl-provider

auto eth0
iface eth0 inet dhcp

auto eth0:avahi
iface eth0:avahi inet manual