Comment 5 for bug 104026

I realized I also had this problem on my laptop with edgy.
In both cases I could fix my problem by changing /etc/network/interfaces :

My home computer now only has got
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

while my laptop only has
auto lo
iface lo inet loopback

I can connect to the internet with both of them (kubuntu)
Before they both had "way to much" in /etc/network/interfaces. My home-computer had:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp

auto wlan0
iface wlan0 inet dhcp