Sorry for my English. I'm writing from Brazil and the only reason that I'm not posting in Portuguese is because I want to let this information available for a bigger number of users.

I had some problems wile installing the Marvel Yukon Ethernet PCI on my Debian. I bought this notebook because it seems to feet all my needs, with a well sized RAM, processor and HD (the only problem is the notebook keyboard, that start to make ugly-typing noises after some time).

This post is dedicated to help other users that want to use almost any Linux flavor at their U405 series notebooks.

In first place, in order to have a notebook U405-S2854 working with the correct 1280x800 resolution, I had to abandon my old friend Debian Etch (stable - 2.6.18 kernel) and install Debian Lenny (testing - 2.6.24 kernel) because the package "xserver-xorg" at Debian Etch had problems to recognize the Intel VGA controller. I spent hours looking for a good solution at www.intellinuxgraphics.org website with no success.

Well... a little les conversation and MUCH more action:

If you have installed a 2.6.18 kernel or any older one, probably the X server will not be able to recognize your VGA controller and will configure it as a VESA adapter, using 1024x768 resolution, if you are satisfied with this (poor) resolution just go to the site http://www.marvell.com/drivers download, install your new Ethernet controller and live happy ever after.

But if you are using a kernel starting at 2.6.24, so the X server can really identify your "VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller" you may face some problems installing your Ethernet Card. The good news is that i found someone who solved the problem!

All you need to do is to open a terminal and copy-paste the following commands.

.$ sudo su -
(type your password)
.# rmmod sky2
.# cd /lib/modules/`uname -r`/kernel/drivers/net
.# cp -p sky2.ko{,.orig}
.# perl -pe 's/\0\0\x6c\x43/\0\0\x55\x43/g' sky2.ko.orig > sky2.ko
.# echo sky2 >> /etc/modules
.# modprobe sky2

Here is the URL that made my life easier http://ubuntuforums.org/showthread.php?p=5285654#post5285654

I hope this hint is useful for you as it was to me!

Regards.