Return-path: <linux-wireless-owner@vger.kernel.org>
Received: from mail-oa0-f52.google.com ([209.85.219.52]:35210 "EHLO
	mail-oa0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1755272Ab3IKQeF (ORCPT
	<rfc822;linux-wireless@vger.kernel.org>);
	Wed, 11 Sep 2013 12:34:05 -0400
Received: by mail-oa0-f52.google.com with SMTP id f4so9441136oah.25
        for <linux-wireless@vger.kernel.org>; Wed, 11 Sep 2013 09:34:04 -0700 (PDT)
Message-ID: <52309B75.3010408@lwfinger.net> (sfid-20130911_183409_832175_E46A19D3)
Date: Wed, 11 Sep 2013 11:33:57 -0500
From: Larry Finger <Larry.Finger@lwfinger.net>
MIME-Version: 1.0
To: Dan Williams <dcbw@redhat.com>
CC: Vincent Thiele <vincentthiele@gmail.com>,
	linux-wireless@vger.kernel.org
Subject: Re: No connection with TP-Link TL-WN823N (rtl8192cu)
References: <CAEZsi7Hde5NyTRgm7Lf_4LvHMAEJouzaqMNUwxr-iSipuEcsyQ@mail.gmail.com>  <522E4315.4040806@lwfinger.net> <1378764913.31180.9.camel@dcbw.foobar.com>  <CAEZsi7FY8HdBcb0p1svijAdFjB0MbrYv_Zft0B_+RQTpGWCnhQ@mail.gmail.com> <1378916091.1693.21.camel@dcbw.foobar.com>
In-Reply-To: <1378916091.1693.21.camel@dcbw.foobar.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Sender: linux-wireless-owner@vger.kernel.org
List-ID: <linux-wireless.vger.kernel.org>

On 09/11/2013 11:14 AM, Dan Williams wrote:
> Some relevant bits:
>
> Sep 11 16:49:38 Arbeits-PC NetworkManager[1104]: <info> (wlan0): supplicant interface state: 4-way handshake -> completed
> Sep 11 16:49:44 Arbeits-PC kernel: [ 1749.454788] wlan0: Connection to AP a0:f3:c1:05:80:ec lost
> Sep 11 16:49:45 Arbeits-PC wpa_supplicant[1205]: wlan0: CTRL-EVENT-DISCONNECTED bssid=a0:f3:c1:05:80:ec reason=4
> Sep 11 16:49:45 Arbeits-PC NetworkManager[1104]: <info> (wlan0): supplicant interface state: completed -> disconnected
> Sep 11 16:49:45 Arbeits-PC NetworkManager[1104]: <info> (wlan0): supplicant interface state: disconnected -> scanning
> Sep 11 16:49:45 Arbeits-PC wpa_supplicant[1205]: wlan0: SME: Trying to authenticate with a0:f3:c1:05:80:ec (SSID='WG-WLAN' freq=2427 MHz)
> Sep 11 16:49:45 Arbeits-PC kernel: [ 1750.282343] wlan0: authenticate with a0:f3:c1:05:80:ec
> Sep 11 16:49:45 Arbeits-PC NetworkManager[1104]: <info> (wlan0): supplicant interface state: scanning -> authenticating
> Sep 11 16:49:45 Arbeits-PC kernel: [ 1750.306287] wlan0: send auth to a0:f3:c1:05:80:ec (try 1/3)
> Sep 11 16:49:45 Arbeits-PC kernel: [ 1750.410098] wlan0: send auth to a0:f3:c1:05:80:ec (try 2/3)
> Sep 11 16:49:46 Arbeits-PC kernel: [ 1750.514232] wlan0: send auth to a0:f3:c1:05:80:ec (try 3/3)
> Sep 11 16:49:46 Arbeits-PC kernel: [ 1750.618374] wlan0: authentication with a0:f3:c1:05:80:ec timed out
>
> So the AP is disconnecting the device a couple seconds with reason 4,
> which is "Disassociated due to inactivity".  My thought is that this
> points to a driver bug (Larry?).

Possibly, but for reference, my Edimax EW-7811Un has been running for 37 hours. 
During that time, I have had no deauthentications and only 2 instances of the 
"AP lost" reconnections. The latter is what I am currently trying to fix, but at 
that error rate, it is difficult. I am running the latest 3.11 kernel from 
wireless testing.

The only thing I am doing that is unusual is that I am pinging my router at a 5 
second interval using the command

ping -i5 192.168.1.1

It is possible that I am preventing a power save operation, which is making a 
difference.

Larry