I have installed Ubuntu on my Dell Latitude e6400 laptop. However, I am unable to connect either with Ethernet or wifi. There are no drivers detected under additional drivers. I enabled networking and created a wireless connection under network connection. However, it did nothing. Ethernet shows: Wired connection 1 (1 day ago)—which was when I installed Ubuntu.
I also tried:
sudo ifconfig eth0 down sudo modprobe -r iwlwifi sudo modprobe iwlwifi 11n_disable=1
but it returns "probe not available".