ubuntu 11.10 MW150u 无法使用

[a63530888]

装了ndiswrapper 装好了驱动

代码： 全选

loli@ubuntu:~$ ndiswrapper -l
rt2870 : driver installed
	device (148F:5370) present

而且

代码： 全选

loli@ubuntu:~$ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=0 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

装了wicd network manager
但是永远都是为发现无限网络

代码： 全选

loli@ubuntu:~$ iwlist scan
lo        Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

wlan0     Failed to read scan data : Network is down

求解答