Yes thanks, It seems that the problem is loading module. It refuses to load the module, modprobe b44 doesn't give any error, but lsmod |grep b44 dones't give anything !!!
the module is not loaded, why ???, the modules is there. the word "eth0" depends on loading or not of the modules ???! ifconfig eth0 gives no such device ?? I tried this too: removed the 75-persistent-net-generator.rules 70-persistent-net.rules in /etc/udev/rules.d , hoping that the udev tries to detect again the device, but problem persists. Help please I don't understand thanks bela