用友善之臂子类中的“无线网络设置”连接笔记本的热点，窗口显示Device:[wlan0:unknow:unknow]
尝试连接后串口输出：
[root@FriendlyARM /]# [ 588.301290] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 589.356767] ieee80211 phy0: assoc: bss (null) not in scan results
[ 591.412230] ieee80211 phy0: assoc: bss (null) not in scan results
[ 592.467073] ieee80211 phy0: assoc: bss (null) not in scan results
[ 667.615858] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 668.670381] ieee80211 phy0: assoc: bss (null) not in scan results
[ 670.725780] ieee80211 phy0: assoc: bss (null) not in scan results
[ 671.791617] ieee80211 phy0: assoc: bss (null) not in scan results
