T510 iwn and 9.0

[Josh Paetzel]

I run a thinkpad T510 with a:

 iwn0: <Intel(R) Centrino(R) Advanced-N 6200> mem 0xf2000000-0xf2001fff irq 17 
at device 0.0 on pci3

iwn0 at pci0:3:0:0:        class=0x028000 card=0x13118086 chip=0x42398086 
rev=0x35 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Centrino Advanced-N 6200'
    class      = network

I ran PC-BSD 8.2 on this hardware for ~ 8 months with no real issues using the 
wifi.  

Last week I upgraded to PC-BSD 9.0-BETA 1.5 which is based off of 9.0-BETA1.  
After I upgraded I started getting frequent disconnections from the wireless 
network at work.  This weekend the AP at work died, but my troubles didn't go 
away.

I brought my laptop home tonight and was getting frequent disconnects here as 
well.  I have an apple airport extreme (the AP at work is a netgear of unknown 
model)

I was able to regain a nice stable connection by running ifconfig wlan0 -ht.


-- 
Thanks,

Josh Paetzel
FreeBSD -- The power to serve
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