Libreboot on R400 no network connection possible

Hi,

I flashed a Thinkpad R400 successfully with libreboot 20160907. Everything is fine, I see the Grub Screen at the beginning and a "Ubuntu" starts from Stick or the encrypted HDD (I want to migrate to Trisquel later).

When the system is ready and I plug in the network cable or try to connect with wifi the notebooks tries endless to connect.
If I am entering a wrong pw fpr the wifi there comes an error, so the system must be connected to the router.

I also checked the Mac Address and it is the one that I put into the flash image. The Network cards are also ready so what can it bee or what can I do to look where the problem is located?

Other Laptops can Connect with the wifi and the cable, also it is an Atheros Card and the error comes also when I am booting a life System from CD.

Greetings
cyrax