[ubuntu-uk] Ethernet not working after board replacement

[James Morrissey]

Hi,

I've just had some repairs done on my faulty Thinkpad x121e. From the
report i got it seems that lenovo replaced the board, the keyboard the
palmrest and updated the BIOS.

Now however i seem to have a problem with the wired network (ethernet).

Since the board has changed i think that i might be experiencing the
problems mentioned here:
http://www.linuxquestions.org/questions/linux-newbie-8/ubuntu-wired-network-not-working-after-motherboard-replacement-909481/

In particular:
"The motherboard will have had onboard Ethernet so the MAC address
will have changed for the interface. make sure the config is not
restricted by MAC also check as udev might have kept the old NIC as
eth0 and the new one is eth1"

I was wondering if anyone here could give me some instructions on how
to check for restrictions by MAC and how to check udev.

Thanks,

j