装了debian.6.0.3之后我的无线网卡出问题了

[hyjhcxj]

ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr 00:1c:bf:07:b2:2d
inet addr:192.168.21.33 Bcast:192.168.21.255 Mask:255.255.255.0
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

iwlist scanning
lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wlan0 Interface doesn't support scanning : Network is down

ifconfig wlan0 up
SIOCSIFFLAGS: 未知的错误 132


把无线网卡开关 关掉再重新打开，就一切正常，这是怎么回事呢，以前从来没有遇到过这种事情？内核的原因？