Non-Trivial (I think) Karmic Koala Upgrade-Related Networking Problem

[Rashkae]

Chris Hiestand wrote:
> I'm really at a loss for what's going on here. With a kernel driver date from 2006, it seems unlikely to be the network driver. But it seems that all I can do is rule things out. I'm not sure where to start looking for an explanation and fix. Yes, I read through my logs - and I can't find anything helpful.
> 
> Any help, or just something that verifies I'm not crazy would be greatly appreciated. Thanks.

I have no insight, so I'm just shooting in the dark here.

Try removing the auto eth0, reboot, then manually ifup eth0  once the 
system is fully booted, just to see what happens.