"waiting for network configuration" no Linux Mint 12 (pppoeconf)

Comente as seguintes linhas do /etc/network/interfaces

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 manual

E reinicie o serviço:

sudo /etc/init.d/networking restart