To: linux-wireless@vger.kernel.org
From: Dennis New <dennisn@dennisn.mooo.com>
Subject: Re: wlan0 keeps deauthenticating DEAUTH_LEAVING about every minute
Date: Wed, 29 Mar 2017 15:36:23 -0400
Message-ID: <20170329153623.4a65bcf647c899f6bc5995ee@dennisn.mooo.com> (sfid-20170329_213741_422247_360039D9)
References: <20170324213237.6f122a9173fa464a5d936f9d@dennisn.mooo.com>
        <1490772890.18052.8.camel@sipsolutions.net>
        <20170329062808.032e71a5327f3405f82df4b2@dennisn.mooo.com>
        <1490788146.7948.19.camel@sipsolutions.net>
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On Wed, 29 Mar 2017 13:49:06 +0200, Johannes Berg wrote:
> On Wed, 2017-03-29 at 06:28 -0400, Dennis New wrote:
> > On Wed, 29 Mar 2017 09:34:50 +0200, Johannes Berg wrote:
> > > On Fri, 2017-03-24 at 21:32 -0400, Dennis New wrote:
> > > > Ever since I upgraded to the 4.10 kernels (I don't think this
> > > > behavior existed in the 4.8 series), after I startup my laptop
> > > > (either from cold boot, or from standby), my wlan0 interface
> > > > keeps
> > > > deauthenticating
> > > > ...
> > > > 19:23:29 kernel: wlan0: authenticate with 00:11:22:33:44:55
> > > > 19:23:29 kernel: ------------[ cut here ]------------
> > > > 19:23:29 kernel: WARNING: CPU: 0 PID: 18925 at
> > > > net/mac80211/mlme.c:287 ieee80211_determine_chantype+0x12e/0x380
> > > 
> > > This is already indicating a severe problem. I don't know how you
> > > end
> > > up in this situation with b43, since that doesn't have any
> > > regulatory
> > > magic afaict.
> > > 
> > > > 19:23:29 kernel: wlan0: associated
> > > > 
> > > > 19:24:29 kernel: wlan0: deauthenticating from 00:11:22:33:44:55
> > > > by
> > > > local choice (Reason: 3=DEAUTH_LEAVING)
> > > 
> > > I'm convinced that this comes from reg_check_channels().
> > > 
> > > The above WARN_ON() already told you that the channel was
> > > considered
> > > invalid.
> > > 
> > > Do you know what channel your AP is on?
> > 
> > 6
> > 
> > > Perhaps show the output of "iw wlan0 scan dump" while it's
> > 
> > connected (you have 60 seconds :P)
> > 
> > I have been having stable connections for the past few days,
> > simply by putting a 60 second sleep before starting my wlan0.
> > Although
> > if I /etc/init.d/net.wlan0 restart it (without the delay), it will
> > still do this deauth'ing.
> 
> Very strange.
> 
> > 	* 2437 MHz [6] 
> > 	  Maximum TX power: 20.0 dBm
> > 	  Channel widths:
> 
> That's quite odd, why isn't it listing any possible channel widths?!
> 
> I get:
> 	* 2437 MHz [6] 
> 	  Maximum TX power: 15.0 dBm
> 	  Channel widths: 20MHz HT40- HT40+
> 
> What's "iw reg get"?

global
country 00: DFS-UNSET
        (2402 - 2472 @ 92), (N/A, 20), (N/A)
        (2457 - 2482 @ 92), (N/A, 20), (N/A), PASSIVE-SCAN
        (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
        (5170 - 5250 @ 160), (N/A, 20), (N/A), PASSIVE-SCAN
        (5250 - 5330 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
        (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
        (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
        (57240 - 63720 @ 2160), (N/A, 0), (N/A)