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Date: Sat, 24 Nov 2012 18:37:26 -0600
From: Nathan Whitehorn <nwhitehorn@freebsd.org>
Subject: Re: wifi + wpa_supplicant in 9.1-RC3
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On 11/20/12 07:52, CeDeROM wrote:
> Hello :-)
>
> I have some problems with WiFi connectivity on my Dell Latitude E4310
> laptop with Intel card. Very often connection is broken, although
> windows clients of the same network is working fine. I need to turn
> radio off and on, sometimes this does not help, I need to kill
> wpa_supplicant and start one by hand, so probably this is something
> related with wpa_supplicant. Anyone observed similar issues?
>
> Btw if WiFi N supported?
>
> Best regards :-)
> Tomek
>

This has been happening to be with iwn(4) for years. It will print 
something to the console about firmware watchdog timeouts and then the 
device needs to be restarted. It seems to happen only in radio-busy 
environments and also happens with clear-text networks.
-Nathan