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From: Zhihao Yuan <lichray@gmail.com>
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Subject: if_wpi crashes when renewing in FreeBSD 8 all versions
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My laptop is a HP Compaq nc8430, and the wireless card is Intel 3945ABG,
with if_wpi driver.
wpi0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 2290
ether 00:1b:77:31:1d:74         media: IEEE 802.11 Wireless Ethernet
autoselect (autoselect)         status: no carrier

I can use the wireless correctly when I start the system. But after some
time (depends on your wireless router renewing settings), it can not renew
the DHCP settings. And, if you try to renew it with sudo /etc/rc.d/netif
restart for like more than 2 times, the whole system will crash.

The interesting thing is, the renewing problem only occurs on the wireless
network with a WPA2 protocol. For the WEP or None-keys network, there is no
problem. For the WPA-EAP network, you can redo the DHCP but not
/etc/rc.d/netif restart.

-- 
Zhihao Yuan
The best way to predict the future is to invent it.