From owner-freebsd-current@FreeBSD.ORG  Thu Nov 18 07:37:42 2010
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Date: Thu, 18 Nov 2010 07:24:45 +0000 (UTC)
From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
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To: Paul B Mahol <onemda@gmail.com>
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Cc: FreeBSD current mailing list <current@freebsd.org>
Subject: Re: net.link.log_link_state_change broken?
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On Tue, 2 Nov 2010, Paul B Mahol wrote:

Hi,

> It appears we do not log such events anymore (at least with wlan
> devices) in console.
>
> I set this sysctl to 0 via sysctl.conf, if I set it to 1, nothing will change.
>
> Because I had loging disabled for very long time I encountered this
> problem just now.

not sure.  Might be, might not be.  Have you further looked into this?

I at least see:
./net80211/ieee80211_freebsd.c:         if_link_state_change(ifp, LINK_STATE_UP);
./net80211/ieee80211_freebsd.c:         if_link_state_change(ifp, LINK_STATE_DOWN);

maybe a good start to search from there?

/bz

-- 
Bjoern A. Zeeb                              Welcome a new stage of life.
         <ks> Going to jail sucks -- <bz> All my daemons like it!
   http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails.html