Return-path: Received: from mail-wm0-f54.google.com ([74.125.82.54]:36031 "EHLO mail-wm0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750916AbcFDRWp (ORCPT ); Sat, 4 Jun 2016 13:22:45 -0400 Received: by mail-wm0-f54.google.com with SMTP id n184so36596375wmn.1 for ; Sat, 04 Jun 2016 10:22:44 -0700 (PDT) To: Craig McQueen , linux-wireless From: Xose Vazquez Perez Subject: Re: rt2800usb firmware rt2870.bin 0.36 not scanning Message-ID: (sfid-20160604_192320_291090_471FBC39) Date: Sat, 4 Jun 2016 19:22:42 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: Craig McQueen wrote: > I have a D-Link DWA-140 USB Wi-Fi device which is rt2800 based (5392 > chipset). I'm trying to use it on a BeagleBone Black based system with > 3.14.x kernel built with Yocto. We're using ConnMan 1.30 at the moment. Try it with a _desktop x86_64 distribution_ , with a *recent kernel* as Fedora: (WORK is gnome) https://alt.fedoraproject.org/pub/alt/live-respins/ > We've been finding some instabilities with it periodically disconnecting > from some networks. So we tried upgrading the firmware file rt2870.bin > from version 0.29 to 0.36. That seems to be more stable with the > network. However, we're finding that it initially doesn't connect, until > the Wi-Fi has been disabled and then re-enabled. ' scan wifi' > and 'iwlist scan' don't return anything until Wi-Fi has been disabled > and then re-enabled. Don't use any wrapper(NM, ConnMan, wicd, ...), usually are buggy. You should use raw commands "iw" and "wpa_supplicant". Hints: https://wireless.wiki.kernel.org/en/users/documentation/iw and wpa_supplicant always running with "-Dnl80211" > Have there been any Linux driver changes needed to support this 0.36 > firmware? Does anyone have any pointers on where to look to understand > this behaviour between 0.29 and 0.36 firmware? closed source, but old changelogs are available at: http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2013-September/006391.html Related to latest firmware releases, ralink/mediatek guys say: "According to the engineers comment, the firmware didn't change much these years, just some bbp register update and led stuff."