I know this question has been raised a number of times in this forum, but after searching for a solution for nearly 3 hours, I am at my limit.

I own a Macbook from 2008 (not a Macbook pro). I was on 10.04, but today I upgraded to 12.04 LTS. And now, my wireless no longer works.

Here is my device:

02:00.0 Network controller: Broadcom Corporation BCM4321 802.11a/b/g/n (rev 03)

Here are some of the things I tried to follow but ultimately didn't work:

1. Using Additional Drivers to get STA. It wasn't letting me even download at first. Somehow, it let me at some point, but it kept saying "Driver not currently in use."




2. http://techdc.blogspot.com/2011/02/ubuntu-broadcom-wireless-sta-driver.html




3. Installing Broadcom Wireless Drivers




4. firmware-linux-nonfree package through synaptics.




5. b43

I tried a dozen other things which I can't even remember. Please help!

I also looked at:

6.) 2008 MacBook WiFi doesn't work with Ubuntu 13.04

which basically led to another forum post which led to 4.)

Here is the output of @WildMan's wireless diagnosis script:

*************** info trace ***************



***** uname -a *****



Linux Doolie 3.2.0-52-generic #78-Ubuntu SMP Fri Jul 26 16:23:24 UTC 2013 i686 i686 i386 GNU/Linux



***** lsb_release *****



Distributor ID: Ubuntu

Description:    Ubuntu 12.04.3 LTS

Release:    12.04

Codename:   precise



***** lspci *****



02:00.0 Network controller [0280]: Broadcom Corporation BCM4321 802.11a/b/g/n [14e4:4328] (rev 03)

    Subsystem: Apple Inc. Device [106b:0088]

    Kernel modules: ssb, wl

03:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8058 PCI-E Gigabit Ethernet Controller [11ab:436a] (rev 13)

    Subsystem: Marvell Technology Group Ltd. Device [11ab:00ba]

    Kernel driver in use: sky2



***** lsusb *****



Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 002 Device 002: ID 05ac:8300 Apple, Inc. Built-in iSight (no firmware loaded)

Bus 003 Device 003: ID 05ac:8205 Apple, Inc. Bluetooth HCI

Bus 007 Device 002: ID 05ac:8242 Apple, Inc. IR Receiver [built-in]

Bus 007 Device 003: ID 05ac:0229 Apple, Inc. Internal Keyboard/Trackpad (MacBook Pro) (ANSI)



***** PCMCIA Card Info *****





***** iwconfig *****





***** rfkill *****



0: hci0: Bluetooth

    Soft blocked: yes

    Hard blocked: no



***** lsmod *****



isight_firmware        12586  0 



***** nm-tool *****



NetworkManager Tool



State: connected (global)



- Device: eth0  [Wired connection 1] -------------------------------------------

  Type:              Wired

  Driver:            sky2

  State:             connected

  Default:           yes

  HW Address:        <MAC address removed>



  Capabilities:

    Carrier Detect:  yes

    Speed:           100 Mb/s



  Wired Properties

    Carrier:         on



  IPv4 Settings:

    Address:         192.168.1.43

    Prefix:          24 (255.255.255.0)

    Gateway:         192.168.1.1



    DNS:             192.168.1.1







***** NetworkManager.state *****



[main]

NetworkingEnabled=true

WirelessEnabled=true

WWANEnabled=true



***** NetworkManager.conf *****



[main]

plugins=ifupdown,keyfile

dns=dnsmasq



[ifupdown]

managed=false



***** interfaces *****



auto lo

iface lo inet loopback









***** iwlist *****





***** resolv.conf *****



nameserver 127.0.0.1

search myhome.westell.com



***** blacklist *****



[/etc/modprobe.d/blacklist-ath_pci.conf]

blacklist ath_pci



[/etc/modprobe.d/blacklist-bcm43.conf]

blacklist b43

blacklist b43legacy

blacklist ssb

blacklist bcm43xx

blacklist brcm80211

blacklist brcmfmac

blacklist brcmsmac

blacklist bcma



[/etc/modprobe.d/blacklist.conf]

blacklist evbug

blacklist usbmouse

blacklist usbkbd

blacklist eepro100

blacklist de4x5

blacklist eth1394

blacklist snd_intel8x0m

blacklist snd_aw2

blacklist i2c_i801

blacklist prism54

blacklist garmin_gps

blacklist asus_acpi

blacklist snd_pcsp

blacklist pcspkr

blacklist amd76x_edac

blacklist ssb



[/etc/modprobe.d/libpisock9.conf]

blacklist visor



***** modinfo *****





***** udev rules *****



# PCI device 0x11ab:0x436a (sky2)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address removed>", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"



# PCI device 0x14e4:0x4328 (ndiswrapper)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address removed>", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"



***** dmesg *****



[   36.874019] wl: module license 'MIXED/Proprietary' taints kernel.

[   36.877635] wl: disagrees about version of symbol cfg80211_scan_done

[   36.877640] wl: Unknown symbol cfg80211_scan_done (err -22)

[   36.877677] wl: disagrees about version of symbol cfg80211_disconnected

[   36.877679] wl: Unknown symbol cfg80211_disconnected (err -22)

[   36.877702] wl: disagrees about version of symbol wiphy_register

[   36.877704] wl: Unknown symbol wiphy_register (err -22)

[   36.877710] wl: disagrees about version of symbol wiphy_new

[   36.877712] wl: Unknown symbol wiphy_new (err -22)

[   36.877717] wl: disagrees about version of symbol cfg80211_roamed

[   36.877719] wl: Unknown symbol cfg80211_roamed (err -22)

[   36.877728] wl: disagrees about version of symbol lib80211_get_crypto_ops

[   36.877730] wl: Unknown symbol lib80211_get_crypto_ops (err -22)

[   36.877739] wl: disagrees about version of symbol cfg80211_ibss_joined

[   36.877742] wl: Unknown symbol cfg80211_ibss_joined (err -22)

[   36.877751] wl: disagrees about version of symbol cfg80211_michael_mic_failure

[   36.877753] wl: Unknown symbol cfg80211_michael_mic_failure (err -22)

[   36.877757] wl: disagrees about version of symbol cfg80211_connect_result

[   36.877759] wl: Unknown symbol cfg80211_connect_result (err -22)

[   36.877772] wl: disagrees about version of symbol wiphy_unregister

[   36.877774] wl: Unknown symbol wiphy_unregister (err -22)

[   36.877783] wl: disagrees about version of symbol cfg80211_get_bss

[   36.877786] wl: Unknown symbol cfg80211_get_bss (err -22)

[   36.877793] wl: disagrees about version of symbol __ieee80211_get_channel

[   36.877795] wl: Unknown symbol __ieee80211_get_channel (err -22)

[   36.877819] wl: disagrees about version of symbol cfg80211_inform_bss_frame

[   36.877821] wl: Unknown symbol cfg80211_inform_bss_frame (err -22)

[   36.877832] wl: disagrees about version of symbol wiphy_free

[   36.877834] wl: Unknown symbol wiphy_free (err -22)



****************** done ******************