I'm running Ubuntu 9.04.
I have an onboard network card. The computer usually boots perfectly, but today, I don't have an IP address. The light is on, on the network card as well as the switch. Other computers work in the switch and I tried other ports to no avail.
# sudo ifconfig eth0 up
SIOCSIFFFLAGS: Resource temporarily unavailable
# sudo dhclient
... some messages ...
receive_packet failed on eth0: Network is down
Driver is e100
. I tried modprobe eepro100
, but still same problem.
Update: Putting in another network card didn't help! Could it be some sort of IRQ conflict?
lspci
command should so your card's make and modeldhclient
won't even get the packets out since the interface can't come up.