If you have a problem with the Broadcom BCM4312,
Please don't try to install the Broadcom STA driver, and if you had installed the driver, please uninstall it. (STA claims to support the BCM4312 card but on many computers with that card, the driver fails to load)
Then run this to remove a file which is often left over from the STA driver:
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sudo rm /etc/modprobe.d/blacklist-bcm43.conf
Finally, use a wired internet connection to install the package "firmware-b43-lpphy-installer" from the Software Manager. Then reboot and your wireless should be working.
On a clean install of Mint, the ONLY thing you should do to your wireless, is installing firmware-b43-lpphy-installer.These instructions can also be used for Broadcom BCM4311, but the necessary package is called "firmware-b43-installer" for this card. The package firmware-b43-lpphy-installer does not install correctly, if your card is not a 4312.
If you come here from Google, and have a different model of Broadcom card (not a 4311 or 4312 chip) then please look elsewhere or open a new topic for your questions.
Registered Linux User #528502
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