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I have an Dell Inspiron 3520 that came pre-installed with windows 8. I installed Ubuntu 12.10 but wasn't able to locate/install the wireless driver and had to go back to windows 8. I'd rather have Ubuntu but I need my wifi.

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wifi doesn't need to be installed in Ubuntu, it auto-detects. When you click the connectivity icon on top-right corner of your Unity desktop (usually 3rd or 4th icon from left), it should show you the wireless status. – Prahlad Yeri Mar 15 '13 at 17:25
Usually, it will just list your wireless networks, or there will be a disabled menu saying "Wireless is disabled by Hardware switch". Is that the case on your laptop ? – Prahlad Yeri Mar 15 '13 at 17:26
actually it says wireless driver not detected, i'm only able to connect via ethernet. – patrick io Mar 15 '13 at 20:13
@patrickio What network card do you have? We can't help you get a driver without knowing that... – Seth Mar 15 '13 at 22:25

First thing you need to do is download the driver. Do a google search for 'broadcom bcm43142 driver linux download deb' Download the appropriate .deb file. Then assuming you downloaded to ~/Downloads open a terminal and:

sudo apt-get install dkms
cd ~/Downloads
dpkg -i wire*.deb

This will install DKMS first then the driver. You then need to reboot.

Hope this helps.

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