我的rt73usb用內核提供的驅動有很多問題 速度慢 和會影起X變慢等
需要使用新的驅動 http://rt2x00.serialmonkey.com/rt73-cvs-daily.tar.gz
編譯 安裝 然后設置

sudo gedit  /etc/network/interfaces
內容如下
auto lo
iface lo inet loopback


wireless-key s:asdfg
wireless-essid Xia's_Home

#WORKING DYNAMIC AES/WPA CONFIG
auto wlan0
iface wlan0 inet dhcp
pre-up ifconfig wlan0 up
pre-up iwconfig wlan0 essid "Xia's_Home"
pre-up iwconfig wlan0 mode managed
pre-up iwconfig wlan0 key "s:asdfg"


sudo gedit  /etc/modprobe.d/blacklist
添加如下內容
####################################################
blacklist rt2500usb
blacklist rt73usb
blacklist rt2x00usb
blacklist rt2x00lib
blacklist ath_pci
#blacklist ipv6