I have Trusty Tahr (Ubuntu 14.04) and the usual advice on proprietary drivers is not working. In 'Additional Drivers' it says about the Broadcom drivers "This device is not working". So I do some lspci -nn and find I have Wireless 14e4:4311 (rev 01) and Ethernet 14e4:170c (rev 02). I have googled what to do about reinstalling either of these, but all the answers require 'apt-get update', but I can not run any of these lines if both drivers are not operational.
Thanks for any pointers, array