Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n
[12:4331] (rev 02)

[   22.490777] b43-phy0: Broadcom 4331 WLAN found (core revision 29)
[   22.491165] b43-phy0: Found PHY: Analog 9, Type 7 (HT), Revision 1
[   22.491175] b43-phy0: warning: 5 GHz band is unsupported on this PHY
[   22.982267] b43 bcma0:0: Direct firmware load failed with error -2
[   22.982270] b43 bcma0:0: Falling back to user helper
... (this repeats 3 more time)
[   more numbers] b43-phy0 ERROR: Firmware file "b43/ucode29_mimo.fw" request
failed (err=-12)
[   more numbers] b43-phy0 ERROR: Firmware file "b43-open/ucode29_mimo.fw"
request failed (err=-12)
[   more numbers] b43-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver...