Comment 7 for bug 136895

I see a similar issue in my Gutsy install. It seems to be dhcp related as the network card will seemingly correctly connect to the access point but will then fail to request a lease using DHCP. Setting the details statically or using dhclient eth1 allows the card to work correctly. The problem is reproducible every time.

My card in question is as follows:
03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG Network Connection [8086:4227] (rev 02)

As the ipw3945 chipset is so common this is fairly important and may well affect Dell laptops too.

This might be a duplicate of other "DHCP is broken on Gutsy" bugs like Bug #121566.