Network card not detected

Network card not detected

[Chris Tapp]

I've built a 'minimal-image' and can get my target (an ALIX board) to  
boot. However, the network interface is not detected - only local  
loopback is available.

I built using 'bitbake minimal-image' - is there something else I need  
to add in to the build to get the kernel to detect and configure the  
ethernet card?

Chris

Re: Network card not detected

[Chris Hallinan]

On Sat, Jun 19, 2010 at 5:42 PM, Chris Tapp <dokuwiki@keylevel.com> wrote:
> I've built a 'minimal-image' and can get my target (an ALIX board) to boot.
> However, the network interface is not detected - only local loopback is
> available.
>
> I built using 'bitbake minimal-image' - is there something else I need to
> add in to the build to get the kernel to detect and configure the ethernet
> card?

Well it depends on what you mean by "detect".  I'm not familiar with
your platform (ALIX board) so I can only offer generic advice.  There
are a few requirements to get your Ethernet card "detected."  First,
you need to make sure your kernel has support for the drivers required
for your board/Ethernet interface.  Let's assume that you do have the
proper support in your kernel.

Next you need a way to configure the interface.  There are several
options here.  You can pass in static config parameters via the kernel
command line.  Or, you can use some type of automatic configuration
such as dhcp.  Pass ip=dhcp on your kernel command line for this
option.

Alternatively, you can use ifconfig to manually configure the
interface once booted, but your minimal-image probably doesn't contain
ifconfig.  I built minimal-image for angstrom-2008.1/beagleboard and
ifconfig is not there.  You didn't mention what distro you're
building, but it's probably not in your minimal-image.

If you really want automatic detection (by which I'm assuming you mean
automatic configuration) then you want some type of device manager, of
which there are two: udev and busybox mdev.  Take a look at some other
image recipes and you'll see examples of DISTRO_DEV_MANAGER, set by
your distribution.

So you can add net-tools (and it's dependencies) to your
minimal-image, or to make life a little easier on yourself, use a more
complete image, something like console-image which should contain
everything you need to light up your Ethernet  port.

Also, this discussion might be more appropriate on the openembedded-users@ list.

-Chris
-- 
Life is like Linux - it never stands still.

Re: Network card not detected

[Chris Tapp]

> So you can add net-tools (and it's dependencies) to your
> minimal-image, or to make life a little easier on yourself, use a more
> complete image, something like console-image which should contain
> everything you need to light up your Ethernet  port.

Thanks - I've had a console-image build running for the past few hours  
- should soon be able to see what this does ;-)

> Also, this discussion might be more appropriate on the openembedded- 
> users@ list.

 From looking at the http://wiki.openembedded.net/index.php/Mailing_lists 
  wiki page I thought this list was no longer available as there's no  
'subscribe' link. I'll have a go and see if I can register as I agree  
my questions are really 'user' related at this time.

Chris

Re: Network card not detected

[Chris Hallinan]

On Sun, Jun 20, 2010 at 11:14 AM, Chris Tapp <dokuwiki@keylevel.com> wrote:
>
>> Also, this discussion might be more appropriate on the openembedded-users@
>> list.
>
> From looking at the http://wiki.openembedded.net/index.php/Mailing_lists
> wiki page I thought this list was no longer available as there's no
> 'subscribe' link. I'll have a go and see if I can register as I agree my
> questions are really 'user' related at this time.

Yeah, I noticed that last night.  I am subscribed to both - admittedly
there is very little traffic on the users list, but I'd sure like to
encourage more!  Not sure what the intention of the list owners is on
this...

-Chris

Re: Network card not detected

[Martyn Welch]

Chris Tapp wrote:
>> So you can add net-tools (and it's dependencies) to your
>> minimal-image, or to make life a little easier on yourself, use a more
>> complete image, something like console-image which should contain
>> everything you need to light up your Ethernet  port.
>
> Thanks - I've had a console-image build running for the past few hours
> - should soon be able to see what this does ;-)
>
>> Also, this discussion might be more appropriate on the
>> openembedded-users@ list.
>
> From looking at the
> http://wiki.openembedded.net/index.php/Mailing_lists wiki page I
> thought this list was no longer available as there's no 'subscribe'
> link. I'll have a go and see if I can register as I agree my questions
> are really 'user' related at this time.

That was indeed the plan:

http://lists.linuxtogo.org/pipermail/openembedded-users/2009-February/000969.html

Even before this, there were many people asking questions on
openembedded-users that either got bad, miss-leading or no answers
because of a lack of experienced / knowledgeable people on that list. I
don't think that the community around OE has grow/matured enough to make
resurrecting that list a good idea.

Martyn

-- 
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