It most likely still thinks that is a valid NIC in your system, and it's highly likely this is messing up the install, so either disable it (unplug or in BIOS, wouldn't know why there is no option in there for it). Or....................................................
Dig a little deeper and make sure your Nic's are in the right order after installing Ubuntu
please google and search the forums here to figure that one out. If no answers to you, post your ifconfig here after installing ubuntu.
Richard