Hello,
I am trying to install gentoo.

When using the live-cd, the internet connection (dhcp) works just fine, using
the

Broadcom Corporation NetXtreme BCM571M Gibabit Ethernet PCI Exress (rev 11)

card (output from lspci).

So for sure there is a certain module which, if used by the kernel, just makes this card
work.

But, sadly enough, after having configured the kernel with genkernel --menuconfig all
and having added some features concerning power management, the kernel does not
seem to contain anymore this module.

In my newly installed system,
ifconfig eth0
just gives
eth0: error fetching interface information: Device not found

As the gentoo manual just gives me the information to compile the module which is the
driver of this card into the kernel, I do now have the problem:
which module is that?
And how do I find out the solution of this kind of problem in general?

As the live-cd knows the driver the kernel needs, there should be a way for me
to find that out, at the least I hope so....

Thanks for all your answers in advance!

after configuring the kernel (with that wretched thing), go make and do "make menuconfig" , go to Device Drivers->Networking->Netwarking Devices->gigabit cards (or something similar), and compile in (mark with[*]) the card driver that has your cards name an it (it should be easy to see, use the "help" option if you like)

then complie, install, and that card should work with no trouble after a reboot

Boot into the liveCD and do an lsmod. This will tell you which modules the kernel has loaded. Then boot to your installation and do the same thing, and modprobe the ones that the liveCD had that your install doesn't.

I'm not sure which broadcom cards the driver supports, but I *think* you're looking for the 'tg3' module. Try modprobe tg3 and see if ifconfig -a shows an eth0 device.

Thanks a lot, the tg3 thing was the one!
I included it in /etc/modules.autoload, and everything is fine.

Can you also tell me how I can tell gentoo to automatically detect if the network cable
is plugged in, while the system is running? For the time being, the connection is
detected at startup (if a cable is plugged in), but if no cable is plugged in ,
the boot procedure stops for a long time before coming up.

Once it is running, plugging in a network cable doesn't change anything - I have
to start dhcpcd eth0 in order to get internet.

And for my wlan - I did get it to work, but only by command lines like:

dhcpcd -k eth0
iwconfig wlan0 key s:my_key_word
dhcpcd wlan0

I found some installation instructions which _should_ start the wlan at boot, but
I did not get it to work. Is there an easy way to do that?