Well, it all depends on what kind of network card you have and if its 
driver was enabled in the kernel in the first place. If you don't know 
what's the module name of your designated real-time NIC (network 
interface card), check the kernel configuration and select the <help> 
tab on the respective driver entry. The module/driver in the document 
you're referring to is just an example, RTnet supports many different 
NICs and the module's removal is only needed if you want to load its 
real-time equivalent (which lives in your RTnet installation and not in 
/lib/modules).

So, please post a complete dmesg and lsmod, so we can see what kind of 
hardware you have in place.

Bernhard


Benjamin Kramer wrote:
> dmesg says a lot, lsmod I found meanwhile.
> The reason why I want to do this is the install guide here:
> http://www.xenomai.org/index.php/RTnet:Installation_%26_Testing
> 
> Here they write:
>     *  You then remove the network card's device drivers or modules by 
> calling e.g. 
> 
> rmmod 8139too
> 
> There is no module 8139too on my System, I can find no module. But later when 
> I edit the rtnet.conf I should insert this module which I removed earlier. 
> All in all I can't manage to test rtnet, even I can't make it run properly. I 
> found another module which I gues suits called "r8168". Is this module right? 
> For what should I search in lsmod?
> 
> Thank you for your help so far...
> 
> 
> -------- Original-Nachricht --------
>> Datum: Thu, 10 Dec 2009 16:30:32 +0100
>> Von: Bernhard Pfund <bernh...@chapter7.ch>
>> An: Benjamin Kramer <benjamin.kra...@gmx.de>
>> CC: rtnet-users@lists.sourceforge.net
>> Betreff: Re: [RTnet-users] How to remove network card\'s driver
> 
>> What does dmesg say?
>>
>> Please post the output of lsmod and dmesg after you tried to rmmod the 
>> driver.
>>
>> BTW: Are you sure your driver is a module and not compiled into your 
>> kernel statically?
>>
>> Bernhard
>>
>>
>> Benjamin Kramer wrote:
>>> For testing RTnet I should remove the network card's device drivers. For
>> example the following command should do this:
>>> rmmod 8139too
>>>
>>> This doesn't really work on my system, how can I find out, what I should
>> use as command on my PC?
>>> I gues this is a loser question, but please help me, slowly I'm kind of
>> desperate...
> 


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