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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".

share|improve this question
what is the output of ifconfig and lshw -c network – Tarun Nov 18 '13 at 12:31
ipconfig returns No command 'ipconfig' found.lshw -c network retunrs network controller and other describtion of the controller. BCM4322 802.11a/b/g/n wireless LAN controller. – Deb Nov 19 '13 at 5:34
its not ipconfig its ifconfig please edit your question and put all the details with your it. – Tarun Nov 19 '13 at 5:38

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