From owner-freebsd-current@FreeBSD.ORG Tue Oct 8 18:49:51 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 5699EBE3 for ; Tue, 8 Oct 2013 18:49:51 +0000 (UTC) (envelope-from jhs@berklix.com) Received: from land.berklix.org (land.berklix.org [144.76.10.75]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id DAA5D27F9 for ; Tue, 8 Oct 2013 18:49:50 +0000 (UTC) Received: from mart.js.berklix.net (pD9FBE0EC.dip0.t-ipconnect.de [217.251.224.236]) (authenticated bits=128) by land.berklix.org (8.14.5/8.14.5) with ESMTP id r98InkAP059817; Tue, 8 Oct 2013 18:49:47 GMT (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (fire.js.berklix.net [192.168.91.41]) by mart.js.berklix.net (8.14.3/8.14.3) with ESMTP id r98InX0Z062066; Tue, 8 Oct 2013 20:49:33 +0200 (CEST) (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (localhost.js.berklix.net [127.0.0.1]) by fire.js.berklix.net (8.14.4/8.14.4) with ESMTP id r98InKOn057406; Tue, 8 Oct 2013 20:49:27 +0200 (CEST) (envelope-from jhs@fire.js.berklix.net) Message-Id: <201310081849.r98InKOn057406@fire.js.berklix.net> to: freebsd-current@freebsd.org Subject: Re: urtwn driver for Edimax EW-7811U WLAN nano USB Adapter From: "Julian H. Stacey" Organization: http://berklix.com BSD Unix Linux Consultancy, Munich Germany User-agent: EXMH on FreeBSD http://berklix.com/free/ X-URL: http://www.berklix.com In-reply-to: Your message "Tue, 08 Oct 2013 19:41:37 +0200." Date: Tue, 08 Oct 2013 20:49:20 +0200 Sender: jhs@berklix.com Cc: Alfred Perlstein X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Oct 2013 18:49:51 -0000 > I too am seeing > urtwn0: timeout waiting for checksum report & urtwn0: at uhub3, port 3, addr 4 (disconnected) (BTW there's no external hub, uhub3 must be inside laptop, & there's no loose connection, laptop was not touched, all work was remote) PS a typical sample comparison of scanned signal strengths of one of the ~15 nets localy: 54M -49:-86 100 EP RSN WPA WME run0 big stick, 54M -69:-95 100 EP RSN WPA WME urtwn0 nano edimax EW-7811Un so the edimax is typically down about 20 on left column on all ~15 local nets. The aerial must be a minute fraction of the wavelength. I suppose wavelengths are is approx: 3 x 10^8 metre/second / 2.4 GHz = 3/2.4 x 10^(8-9) m = 12.5 cm & ~6cm for 5GHz band. Cheers, Julian -- Julian Stacey, BSD Unix Linux C Sys Eng Consultant, Munich http://berklix.com Reply below not above, like a play script. Indent old text with "> ". Send plain text. No quoted-printable, HTML, base64, multipart/alternative.