UbuntuHelp:WifiDocs/Driver/b43
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Broadcom wireless chipset
Broadcom manufactures a chipset family called the Broadcom 43xx or b43 which is used in a lot of wireless products, including the Apple Airport Extreme, some Linksys products, and many HP, Compaq, Dell and Acer notebooks. A complete listing of other cards which contain this chipset can be found here. Note that not all chipsets with a name like "Broadcom 43xx" are supported.
How To find out if you have wireless card with a Broadcom 43xx chipset
In a terminal, type `lspci `, which lists the PCI devices in your system. The output might include something like
0000:02:02.0 Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 03)
in which case you've got a Broadcom 4306. You can find out a bit more information about the driver by typing `lspci -v`, which in my case includes the line
0000:02:02.0 0280: 14e4:4320 (rev 03)
It also will tell you which kernel module is in use for the device.
New b43 and b43-legacy Drivers
The current (Spring 2008, kernel 2.6.24) wireless-2.6 branch of the linux kernel provides two new unified wireless drivers, called b43 and b43-legacy. These drivers replace the old WifiDocs/Driver/bcm43xx. The reason there are two is that b43 works with v4 broadcom firmware and b43-legacy works with the v3 firmware. New b43 driver still doesn't work without proprietary firmware, which isn't included in Ubuntu and must be downloaded separately, using b43-fwcutter package (from Ubuntu universe) or simply by installing b43-firmware package from http://ubuntu.cafuego.net (from Hardy distribution). New b43 driver doesn't work with old bcm43xx firmware. b43 drivers are included in Ubuntu 8.04 LTS (Hardy), but also can be used in 7.10 (Gutsy), see [[UbuntuHelp:WifiDocs/Device/Broadcom_BCM4318_[AirForce_One_54g]_(Native_Driver)|WifiDocs/Device/Broadcom_BCM4318_[AirForce_One_54g]_(Native_Driver)]] for more info.
