First of all, NO MIXING & MATCHING of METHODS. You obviously used
some guide to install the drivers and get it working until the Kernel
upgrade. What is the location of that guide?
After all, we can't see what you did two weeks ago......and don't have
a clue as to what you did yesterday........
What is the Ubuntu Version? 8.04x, 8.10, 9.04, 9.10, 10.04, ????
32 bit or 64 Bit? .....Yes, it makes a difference!...Depending....
Laptop or Desktop?
USB Wifi Dongle or onboard Wifi?
Are you using the Windows Drivers and Ndiswrapper? Or how long has it
worked? Maybe never? Using Backports? STA? Madwifi?
If you are unsure answer all you can and post the output of the commands
First we need to know what hardware your Laptop/Desktop has installed.
Just use "copy & paste" for the commands ONE AT A TIME!!!!!.
And, there is a difference in LSPCI and lspci.
Just copy & paste the commands in a Terminal window,
lshw -C network
one at a time, and post the results.
(If you are using versions earlier than 9.10, or 9.04 use:
If you connect via Ethernet cable, SYSTEM -> ADMINISTRATION -> UPDATE MANAGER and then try connecting the Wifi it most likely will work.
Pick one method and stick with it. Don't mix-n-match.
Your options that can be used, depending on what hardware you have:
1. Ndiswrapper and a Windows Driver (32 Bit)....??????.inf & sys
Your M$ Windows experience should be used to locate the proper driver....
2. Madwifi Drivers
(you will need to install.....build-essential & headers file.......meaning you need to download & install)
3. Drivers provided by Version 10.04
4. Broadcom Drivers w/Firmware
So, post all the info you can.......from the above....