I can't get my Broadcom BCM4331 wifi on 14.04 to work

Question

I'm trying to skip downloading files that I already have, and I want to determine if I already have them based on the 'Content Disposition' header. Is there a simple way to do this in Powershell?

For some instances I was able to send a 'HEAD' request before the 'GET' so I could get the file name, but I discovered that's not reliable, and really need to read the headers of the 'GET' to determine if I want to save the content of that same 'GET'

$headResponse = Invoke-WebRequest $url -WebSession $Session -Method Head

$headResponse.Headers['Content-Disposition'] -match 'filename="(.*)"'
$fileName = $Matches[1]

if((Test-Path $fileName -PathType Leaf) -eq $false){
    Invoke-WebRequest $url -WebSession $Session -OutFile $fileName -Method Get
}

Solution 1

I just copied the driver information from the lspci command, and searched it on this site. I found the answer in Wi-Fi working on Macbook Pro 8.2 on Ubuntu 12.04.

I had to change a few things to make it work for me. Here's what I did:

Run the following in the terminal:

sudo apt-get install b43-fwcutter firmware-b43-installer
sudo dpkg-reconfigure firmware-b43-installer

And a lot of extracting will happen.

Then enter:

dmesg | tail -2

You'll get a response like this:

[ 5866.172626] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 5870.282827] applesmc: FS! : read arg fail

Solution 2

1. First update apt-get:

   apt-get update

2. Then update Linux Image, Linux Headers (this code will determine your systems necessary headers) and install Broadcom DKMS:

   apt-get install linux-image-$(uname -r|sed 's,[^-]*-[^-]*-,,') linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') broadcom-sta-dkms

3. Remove any possible active drivers for the Broadcom WiFi adapter:

   modprobe -r b44 b43 b43legacy ssb brcmsmac bcma

4. Activate the wl driver for the Broadcom WiFi adapter:

   modprobe wl

5. Always best to reboot your system after things like this:

   reboot

Comments

[minion91]

Did you enable wifi through both function keys and network settings? check whether you enable wifi from network settings.(System settings->network).there have a small slider to enable or disable wifi.

[David Foerster]

What's dpkg-reconfigure firmware-b43-installer supposed to do? That command is rather pointless without instructions about which options the reader is supposed reconfigure.