[Ubuntu] Broadcom Wireless STA Driver Activated But Not Currently In Use

我使用的是Kubuntu 12.04，無線信號很不給力。然後按照http://forum.ubuntu.org.cn/viewtopic.php?t=202388中說的方法裝了Windows驅動，發現不起作用後卸載了。結果每次重啓都檢測不到原先的無線網卡驅動，additional drivers中提示Broadcom Wireless STA Driver Activated But Not Currently In Use，必須卸載重裝纔行，但是重啓後又是同樣的問題。Google了一下，在牆外找到一篇博文http://techdc.blogspot.com/2011/02/ubuntu-broadcom-wireless-sta-driver.html（需翻牆） ，照做可以解決問題，就是不知道每條命令是什麼意思。

1. Optionally u can try these commands first.. just to check the connection

lspci -nn
lshw -C Network
lsusb
ifconfig
iwconfig
sudo iwlist scan

Now run the following commands..

sudo modprobe -r b43 ssb wl
sudo modprobe wl
sudo ifconfig eth1 up
sudo iwlist scan

2. Blacklist ssb. Run the following command 

echo blacklist ssb | sudo tee -a /etc/modprobe.d/blacklist.conf

3. Edit rc.local and add the following code at the end.

sudo vi /etc/rc.local

and add this just before "exit 0"

modprobe wl

Now just reboot... the problem should be gone :)