RTL8139 problem

[snpe]

> Well, on hoary the network worked automatically, now I have to manually 
> run dhclient to have network.
> And I think it's causing another problem:
> several applications (one example is gcalctool, another is gnobots2 but 
> they're not the only ones) has 3 minutes delay at startup (wmmon isn't 
> showing any unusual cpu activity until they start). this delay doesn't 
> happen before I run dhclient, so I suspect something is wrong with the 
> network, therefor, I wanna fix the message...

Is localhost interface up
try 
sudo ifconfig -a
you have to have lo and eth0 interface (lo is localhost)

another possibility : bad setting in dns (if you have dns)