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To: Weongyo Jeong <weongyo@freebsd.org>
From: Bengt Ahlgren <bengta@sics.se>
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Date: Thu, 26 Feb 2009 19:06:24 +0100
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Cc: Nathan Butcher <n-butcher@fusiongol.com>, freebsd-stable@freebsd.org
Subject: Re: ural driver stalls under FreeBSD7.1
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Weongyo Jeong <weongyo.jeong@gmail.com> writes:

> On Thu, Feb 26, 2009 at 01:20:36PM +0900, Nathan Butcher wrote:
>> I have a Buffalo WLI-U2-KG54-AI wireless USB adaptor.
>> It has been malfunctioning for quite a while under FreeBSD7.0 and 7.1
>> 
>> Typically, It works for a while until eventually it stalls data
>> transfers completely. It always seems to do this after an unspecified
>> amount of time.
>> 
>> I know the hardware isn't at fault because the device works fine under
>> Linux.
>
> Could you please check that `ifconfig <ifname> -bgscan' disabling the
> background scan helps your symptom?

The above sounds like the same problem as this:

http://lists.freebsd.org/pipermail/freebsd-mobile/2009-February/011376.html
http://lists.freebsd.org/pipermail/freebsd-mobile/2009-February/011343.html

The problem is in the background scanning logic in sys/net80211.

Bengt