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Date:      Sun, 22 Nov 2015 12:54:47 -0700
From:      Sergey Manucharian <sm@ara-ler.com>
To:        freebsd-current <freebsd-current@freebsd.org>
Cc:        Adrian Chadd <adrian.chadd@gmail.com>, Florian Limberger <flo@snakeoilproductions.net>
Subject:   Re: Panic while waiting on wlan0
Message-ID:  <20151122195446.GA16398@dendrobates.araler.com>
In-Reply-To: <CAJ-Vmo=SrRH89%2Bej-c5DSm9SwUt1SM3_w4JpPSPMteQPPmWBrQ@mail.gmail.com>
References:  <564AF74A.2090700@snakeoilproductions.net> <CAJ-VmonB1S-Ckx2UtcupURNa1KfCrCXcLqAMnmLZAZMbcqMaiA@mail.gmail.com> <5651B5B6.1010701@snakeoilproductions.net> <CAJ-Vmo=SrRH89%2Bej-c5DSm9SwUt1SM3_w4JpPSPMteQPPmWBrQ@mail.gmail.com>

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> On 22 November 2015 at 04:31, Florian Limberger
> <flo@snakeoilproductions.net> wrote:
> > On 17.11.15 17:42, Adrian Chadd wrote:
> >>
> >> try updating to head as of today. Some callout issues were fixed.
> >
> > The crashes are fixed alright, thank you.  I still have a rather difficult
> > to reproduce issue, where the wpa_supplicant hangs in SCANNING state
> > indefinitely, even if the Notebook is very near to the AP.  I’ve had this
> > issue occasionally before, but since the crashes started it has become more
> > frequent.  Is there anything I can do to debug the behaviour?  Until now I
> > have only observed it in wpa_supplicant and have no idea how I might
> > proceed.
> >
> Excerpts from Adrian Chadd's message from Sun 22-Nov-15 08:52:
> 
> Do this:
> 
> * compile in IEEE80211_DEBUG;
> * do "wlandebug +scan"
> 
> That way we can see if net80211 is refusing to continue scanning.

I have a similar well-reproducable crash on my ThinkPad with "iwn"
driver and "iwn6000fw" when I try to restart wlan:
 
 # service netif restart

Otherwise it works fine, no problem at all.

Sergey



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