Return-path: Received: from mail-qt0-f174.google.com ([209.85.216.174]:43440 "EHLO mail-qt0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933278AbeFQKIX (ORCPT ); Sun, 17 Jun 2018 06:08:23 -0400 Received: by mail-qt0-f174.google.com with SMTP id y89-v6so12841274qtd.10 for ; Sun, 17 Jun 2018 03:08:23 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20180615172335.VSLI7.207164.root@dnvrco-web09> References: <20180615165838.QFYTH.206966.root@dnvrco-web09> <20180615172335.VSLI7.207164.root@dnvrco-web09> From: =?UTF-8?Q?Micha=C5=82_Kazior?= Date: Sun, 17 Jun 2018 12:08:22 +0200 Message-ID: (sfid-20180617_120826_953167_514B5EAB) Subject: Re: Atheros AR9462 - 5Ghz not working To: mgreger@cinci.rr.com Cc: Janusz Dziedzic , linux-wireless , sedat.dilek@gmail.com Content-Type: text/plain; charset="UTF-8" Sender: linux-wireless-owner@vger.kernel.org List-ID: On 15 June 2018 at 19:23, wrote: > ---- mgreger@cinci.rr.com wrote: >> ---- "Micha=C5=82 Kazior" wrote: >> > Your noise floor readout in survey dump is terribly bad for 5GHz. It >> > ain't stellar for 2.4GHz either but within reason nonetheless. >> > >> > Did you try using the card in a different device? I wonder if the >> > device you're trying to use it in has some sort of internal noise on >> > those frequencies and/or ath9k's ANI isn't able to deal with it. >> > >> > >> > Micha=C5=82 >> > >> > On 15 June 2018 at 15:31, wrote: >> >> I did. >> I took it out of the Penguin-Z notebook and put it in a Dell XPS15 9560 = running Windows 10. Only 2.4Ghz networks were visible from there as well. N= ot exactly apples-to-apples, but consistent results. This reduces likeliness this is tied to a os/driver issue. Maybe calibration data on the device eeprom is broken? Or maybe it's a hardware defect? > Could it be antenna related (in multiple devices)? Antennas can be designed to work better on certain frequency ranges. I wouldn't expect such a dramatic effect though. > On wikidevi.com I see some M.2 cards listed with an antenna connector of = U.FL and others with MHF4. I can't find anything describing the difference,= if any. The connectors seemed to fit OK. Also, what's the deal with 'main'= and 'aux' antenna connectors? I've seen people suggest swapping them has h= elped in some cases with poor signal, while others insist that it makes no = difference. I have not tried swapping the connectors. I think it's not a connector problem because 2.4GHz scan results report reasonable signal strength for found APs (-60dBm). My experience is that if you use a wrong (but seemingly fitting) connector you'd get near 0 results or below -90dBm across the board. Micha=C5=82