Sorry, I forgot one thing (which Basilio correctly asked information, whoops): does your connection work at all with network-manager, do you see a difference when the cable is plugged in or not (different icon for connected / not connected)? If not, you really need to supply the technical info asked for.
Sorry, I forgot one thing (which Basilio correctly asked information, whoops): does your connection work at all with network-manager, do you see a difference when the cable is plugged in or not (different icon for connected / not connected)? If not, you really need to supply the technical info asked for.