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Installed 12.04 on dell inspiron 5420. wired connection is working however wifi and bluetooth connection does not work. In fact I can't see wlan0. Can I know the correct driver to install?

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You could start by typing 'lspci' in a terminal to know which Broadcom card you have. – To Do Sep 9 '12 at 8:59
Take a look at this:… – To Do Sep 9 '12 at 9:01
result of lspci 02:00.0 Network controller: Broadcom Corporation Device 4365 (rev 01) – ADARSH MJ Sep 9 '12 at 15:43
is it solved? did you look at the link? – green Sep 9 '12 at 15:54
possible duplicate of Installing Broadcom Wireless Drivers – Pilot6 Sep 24 '15 at 21:32


Ubuntu 12.04. WiFi not working

Check if the wifi card is blocked (Terminal)

rfkill list wlan (for wifi)


rfkill list all (for wifi and bluetooth)


rfkill unblock wlan (for wifi)


rfkill unblock all (for wifi and bluetooth)

Restart the network:

sudo service network-manager restart
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it's the driver issue, the broadcom didn't release the driver source. some guy extracted a amd64 binary version from Dell's pre-loaded Ubuntu. follow this link to see more.

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