筆記本裝了最新的ubuntu12.10，結果無線網絡卡的驅動又出了問題，系統根本不能識別無線網絡卡，使用ifconfig只能看到有線網絡卡eth0.因為上次安裝ubuntu11.10的時候遇到了同樣的問題，所以本人胸有成竹。覺得照著上次的解決步驟重新來一次就一切OK了，可事實卻並非如此。

       上次安裝11.10時遇到的問題是無線網絡卡驅動模組沒有自動載入，需手動載入。我是在ubuntu社群上找到了相關教程（教程連結），根據教程在附加驅動中將原有的驅動解除安裝之後使用apt-get安裝了新驅動，但接下來按照教程執行以下命令後卻根本無效：

sudo modprobe -r b43 ssb wl
sudo modprobe wl
 

       可這次在ubuntu12.10下按照相同的策略重灌並載入模組後，無線網絡卡還是沒有被識別，我開始懷疑是驅動程式和升級之後的ubuntu系統不匹配。後來在askubuntu上看到了有人和我遇到了同樣的問題並又詳細的解決方法（

    Uninstall the bcmwl-kernel-source package by issuing the following command on a terminal:

    sudo apt-get remove bcmwl-kernel-source

    make sure that the firmware-b43-installer and the b43-fwcutter packages are installed

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

    type into terminal:

    cat /etc/modprobe.d/* | egrep 'bcm'

    (you may want to copy this) and see if the term 'blacklist bcm43xx' is there

    if it is, type cd /etc/modprobe.d/ and then sudo gedit blacklist.conf

    put a # in front of the line: blacklist bcm43xx

    then save the file (I was getting error messages in the terminal about not being able to save, but it actually did save properly).

    reboot
 

讓我不明白的是bcm43**怎麼就加入了blacklist!