More information on b43 b43legacy can be found on the linux wireless b43 driver page. My laptop does not have an lan cable, so i use usb tethering from my phone. Informationen uber paket firmwareb43installer in xenial ubuntu. Broadcom usb devices are handled by the brcmfmac driver b43legacy. Kernel automatically loads correct driver for the present hardware it checks for revision of the. Install broadcom b43 and b43 legacy wireless driver in ubuntu. This package provides a tool for extracting bcm43xx wireless chip firmware from broadcoms proprietary driver files. You need to have firmware files usually in libfirmware so b43 legacy can upload them to the card and run properly. In this article i will show you how to make your wireless connection work on broadcam bcm4311 network interface card, on ubuntu, debian and linux mint systems to fix your wireless problem, this is what you have to do. Nonfree vendor driver, not in mainline linux kernels. My laptop has a bcm43142 driver which is proprietary, but when i used ubuntu and lubuntu, it was very easy to enable through additional drivers. Kernel will automatically pick a proper module for you. If your using unity then goto dashhome and search for additional drivers, then open it. Ubuntu details of package firmwareb43installer in xenial.