I am using Acer aspire-5002wlmi laptop and set up a dual boot with Windows XP and Ubuntu 12.04. Wifi is well working in XP but when I start Ubuntu I will get the below error.
[ 95.514855] b43-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all the instruction on this website.
then I followed the instructions from the below link
but I am stuck in installing the Broadcom Wifi firmware in terminal and it is showing this error:
E: unable to locate package firmware-b43-installer