[ubuntu-uk] Ethernet not working after board replacement

[James Morrissey]

Great,

Thanks for the help. Deleting
/etc/udev/rules.d/70-persistent-net.rules and restarting seemed to do
the trick.

Thanks again.

j

On 26 June 2012 09:48, Simon Greenwood <sfgreenwood at gmail.com> wrote:
>
>
> On 26 June 2012 09:20, James Morrissey <morrissey.james1 at gmail.com> wrote:
>>
>> 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.
>>
>
> There are more fundamental things you can check: do the ethernet port LEDs
> light at the computer and switch/modem ends? What happens if you boot from a
> live CD/USB?
>
> The MAC address of your machine will have changed, and you can see what it
> is by opening a terminal and typing 'ifconfig eth0'. Your MAC address is the
> HWaddr field on the first line.
>
> Udev rules are in /etc/udev/rules.d. On my desktop there's a ruleset
> called 70-persistent-net.rules which does have your MAC address in it
> although I would have thought that would have been updated by the OS if it
> detected a change. As Alan says, if it's different to ifconfig HWaddr,
> delete it and it should be rebuilt.
>
> s/
> --
> Twitter: @sfgreenwood
> "TBA are particularly glib"
>
>
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>



-- 
James Morrissey
Research Officer
Refugee Studies Centre | Department of International Development |
University of Oxford
3 Mansfield Road | Oxford, United Kingdom | OX1 3TB