TL-WN722N的芯片是AR9271，驱动型号是 ath9k_htc
下面是安装过程：01 root@bt:~# lsusb02 Bus 001 Device 003: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n 03 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub 04 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub 05 root@bt:~# mkdir ar9271 06 root@bt:~# cd ar9271/ 07 root@bt:~/ar9271# git clone git://git.kernel.org/pub/scm/linux/kernel/git/dwmw2/linux-firmware.git 08 root@bt:~/ar9271# cp ./linux-firmware/ar9271.fw /lib/firmware 09 root@bt:~/ar9271# wget http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2.6.tar.bz210 root@bt:~/ar9271# tar -jxvf compat-wireless-2.6.tar.bz2 11 root@bt:~/ar9271# cd compat-wireless-2010-10-04/ 12 root@bt:~/ar9271/compat-wireless-2010-10-04# ./scripts/driver-select ath9k_htc 13 Processing new driver-select request… 14 Backing up makefile: Makefile.bk 15 Backup exists: Makefile.bk 16 Backup exists: Makefile.bk 17 Backing up makefile: drivers/net/wireless/Makefile.bk 18 Backing up makefile: drivers/net/wireless/ath/Makefile.bk 19 Backing up makefile: net/wireless/Makefile.bk 20 Backing up makefile: drivers/net/Makefile.bk 21 Backing up makefile: drivers/ssb/Makefile.bk 22 Backing up makefile: drivers/misc/eeprom/Makefile.bk23 root@bt:~/ar9271/compat-wireless-2010-10-04# make 24 root@bt:~/ar9271/compat-wireless-2010-10-04# make install 25 root@bt:~/ar9271/compat-wireless-2010-10-04# cd ~/ar9271/ 26 root@bt:~/ar9271# reboot 重启后，用 iwconfig 就能看到 wlan0 了。
值得一提的问题：如果重启后看不到 wlan0 ，用 dmesg | grep -e ath -e wlan 看下是不是有错误。usb 1-1: ath9k_htc: Firmware – ar9271.fw not found如果是这个not found错误，那说明你没有把 ar9271.fw 拷贝到 /lib/firmware 下面。ar9271.fw 的来源，可以直接到 http://git.kernel.org/?p=linux/kernel/git/dwmw2/linux-firmware.git;a=tree下载，不过只能通过raw 下载，否则下载的文件大小都是0字节的。用 raw 连接下载需要更改文件名。
还有一种安全一点办法就是上面用到的 git 命令，把所有的 fw 都下下来，这样就不用当心下载错什么问题，就是用的时间稍长些。
虚拟机上的问题：root@bt:~# dmesg | grep -e ath -e wlan md: multipath personality registered for level -4 usb 1-1: ath9k_htc: Firmware – ar9271.fw download failed ath9k_hif_usb: probe of 1-1:1.0 failed with error -22 usbcore: registered new interface driver ath9k_hif_usb搜索到的全是驱动源文件，试试没有安装 VMTools 的BT4 R1能直接识别出是 Atheros Communications, Inc. AR9271 802.11n ，如果是BT4 ，只能识别出是 Atheros Communications 。
