Comment 1 for bug 326408

I also had this problem.
lspci -n reports the board as being
01:00.0 0200: 10ec:8136 (rev 02)
Aparently with kernel 27-11 there is a module called r8101 that should be more appropriate, the question is how to load that module instead of the r8169
You have to go into /lib/modules/2.6.27-11-generic and edit the file modules.alias
add a line like the following
alias pci:v000010ECd00008136sv*sd*bc*sc*i* r8101
that means that when a pci id 8136 is found the module r8101 should be loaded.
Look at http://wiki.archlinux.org/index.php/ModaliasPrimer for further info.
Then you have to recreate the ram image (I think), this should work
depmod -a
mkinitramfs -o /boot/initrd.img-`uname -r`
I hope it helps