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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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. https://bbs.archlinux.org/viewtopic.php?id=145884
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ubuntu-1204-wifi-not-working-at-laptop-or-notebook-unblock-it
Ubuntu 12.04. WiFi not working
Check if the wifi card is blocked (Terminal)
rfkill list wlan (for wifi)
OR
rfkill list all (for wifi and bluetooth)
UNBLOCK:
rfkill unblock wlan (for wifi)
OR
rfkill unblock all (for wifi and bluetooth)
Restart the network:
sudo service network-manager restart
ptheo
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