Return-path: Received: from mail-wg0-f45.google.com ([74.125.82.45]:35875 "EHLO mail-wg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753572AbbE0TYP (ORCPT ); Wed, 27 May 2015 15:24:15 -0400 Received: by wgbgq6 with SMTP id gq6so18232296wgb.3 for ; Wed, 27 May 2015 12:24:14 -0700 (PDT) Message-ID: <556619DB.4070307@gmail.com> (sfid-20150527_212544_374438_22326523) Date: Wed, 27 May 2015 22:24:11 +0300 From: Nick Dimov MIME-Version: 1.0 To: Emmanuel Grumbach , Dan Williams CC: linux-wireless Subject: Re: packet loss, disconnects and possible bug in iwlwifi References: <55605637.1080503@gmail.com> <55650565.6020303@gmail.com> <1432742132.15971.29.camel@redhat.com> In-Reply-To: Content-Type: text/plain; charset=utf-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: Hello, does it help that the disconnects happen at precise intervals, please check this: mai 27 22:18:52 nick-G55VW wpa_supplicant[4506]: wlan5: CTRL-EVENT-CONNECTED - Connection to d8:50:e6:da:1d:b4 completed [id=0 id_str=] mai 27 22:19:56 nick-G55VW wpa_supplicant[4506]: wlan5: CTRL-EVENT-CONNECTED - Connection to d8:50:e6:da:1d:b4 completed [id=0 id_str=] mai 27 22:20:59 nick-G55VW wpa_supplicant[4506]: wlan5: CTRL-EVENT-CONNECTED - Connection to d8:50:e6:da:1d:b4 completed [id=0 id_str=] mai 27 22:22:03 nick-G55VW wpa_supplicant[4506]: wlan5: CTRL-EVENT-CONNECTED - Connection to d8:50:e6:da:1d:b4 completed [id=0 id_str=] You can see the interval is the same and is always 63-64 seconds. On 27.05.2015 21:34, Emmanuel Grumbach wrote: > On Wed, May 27, 2015 at 6:55 PM, Dan Williams wrote: >> On Wed, 2015-05-27 at 02:44 +0300, Nick Dimov wrote: >>> Hello, >>> thank you for your response. I attach the full syslog since the last >>> boot which contains some disconnects. I enabled debug mode for >>> wpa_supplicant with -dd option (let me know if you need anything else). >>> >>> I also tried connecting directly, i.e. without NetworkManager but >>> manually with wpa_supplicant and I still get disconnects, howvever >>> wpa_supplicant gives different logs with different drivers. Please, see >>> the file wifi.log (you can see there the driver i used in >>> wpa_supplicant, that log doesn't have the debug activated but let me >>> know if you need that too) >> So if NM isn't involved in your later runs (and it's not, looking at the >> logs), then I'm not sure what the issue could be except something in the >> driver. >> >> mai 27 02:31:54 nick-G55VW wpa_supplicant[1565]: nl80211: Event message >> available >> mai 27 02:31:54 nick-G55VW wpa_supplicant[1565]: nl80211: Drv Event 20 >> (NL80211_CMD_DEL_STATION) received for wlan5 >> mai 27 02:31:54 nick-G55VW wpa_supplicant[1565]: nl80211: Delete station >> d8:50:e6:da:1d:b4 >> mai 27 02:31:54 nick-G55VW kernel: wlan5: deauthenticating from >> d8:50:e6:da:1d:b4 by local choice (Reason: 3=DEAUTH_LEAVING) >> >> I don't see anything interesting around those lines, so I guess its up >> to Emmanuel now... the tracing he requests would be good to get. >> > I suspect a regulatory problem. This is why I asked what was the > channel used on 2.4GHz. On 5.2GHz we have seen bugs happening because > of the regulatory database being ancient on Ubuntu. 2.4GHz should rule > these problems out, unless we are talking about channel 12 and up or > something like that.