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This question already has an answer here:

I am trying to get wireless Internet on this dell latitude D430.

What can I do?

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marked as duplicate by BuZZ-dEE, Seth, guntbert, Florian Diesch, karel Jan 24 '14 at 0:16

This question was marked as an exact duplicate of an existing question.

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Please edit your question to add details of your wireless card from the terminal command: lspci -nn | grep 0280 – chili555 Jan 23 '14 at 20:33

Try this:

sudo apt-get update
sudo apt-get install firmware-b43-installer
sudo apt-get remove bcmwl-kernel-source
sudo reboot
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Are you quite sure his laptop has a Broadcom wireless card? Which one? – chili555 Jan 23 '14 at 20:35

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