I did linux header and intel.sh. Afterwards:
unplug the RTL card
connect onboard lan.
shows me the intel ethernet controller as postet before
says there is no device.
Afterwards I plugged in the RTL card again but left the cable connection at the onboard lan. I know it makes no sense. Basically the only thing that happens is: at start because RTL card has no connection, the boot process pauses shortly and continues. And of course
eth0 Link encap:Ethernet .....
inet Adresse:192.168.2.111 .....
lo Link encap:Lokale Schleife