[ubuntu-uk] Hooking up a machine running Ubuntu to a Mark 1, BT HomeHub

Rowan rowan.berkeley at googlemail.com
Thu Feb 19 16:08:09 GMT 2009

Thanks for the suggestions,  Guy.

"sudo dmesg grep eth0" gives:

usage: dmesg [-c][-n level][-s bufsize]

"sudo ifconfig -a" gives the same as "sudo ifconfig", namely, local 
loopback only.

Guy Thouret wrote:
> On Thu, 2009-02-19 at 15:23 +0000, Simos wrote:
>> A google search for 'RTL8111/8168B Intrepid' reveals the following 
>> bug report
>> https://bugs.edge.launchpad.net/ubuntu/+bug/285430
> If the OS is actually aware of the physical ethernet interface this 
> bug may be relevant.
> >From the output we have seen so far, eth0 did not show up in the list 
> of interfaces so it is either non-existant or not activated (up).
> Rowan:
> Can you enter the following commands and post the output:
> dmesg | grep eth0
> ifconfig -a
> The first command will show any output from a kernel driver trying to 
> register the eth0 interface.
> The second command will list all network interfaces registered on your 
> machine regardless of their state.
> Here is an example output, we should hope to see something similar:
> guy at guy-laptop:~$ dmesg | grep eth0
> [    0.448004] 0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) 
> 00:13:77:3c:04:fe
> [    0.448007] 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
> [    0.448035] 0000:00:19.0: eth0: MAC: 5, PHY: 6, PBA No: ffffff-0ff
> guy at guy-laptop:~$ ifconfig -a
> ...
> eth0      Link encap:Ethernet  HWaddr 00:13:77:3c:04:fe 
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
>           Memory:fc300000-fc320000
> ... (only relevant part shown)
> If we see output from both commands, then you do indeed have a 
> registered physical ethernet interface on your machine.
> If we do not see output or see errors this would sugggest a driver 
> issue or a physical fault with the ethernet interface.
> A driver issue we can help you overcome.
> If there's a physical fault with the ethernet interface, send the 
> machine back for a replacement.
> If the dmesg | grep eth0 command shows no output, if you attach the 
> output of just the dmesg command by itself we'll probably be able to 
> diagnose the exact cause of the failure.
> Guy. 

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