Return-path: Received: from mail-yw0-f172.google.com ([209.85.211.172]:50020 "EHLO mail-yw0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753130Ab0DCRd7 (ORCPT ); Sat, 3 Apr 2010 13:33:59 -0400 Received: by ywh2 with SMTP id 2so1869751ywh.33 for ; Sat, 03 Apr 2010 10:33:58 -0700 (PDT) Message-ID: <4BB77C03.7040209@lwfinger.net> Date: Sat, 03 Apr 2010 12:33:55 -0500 From: Larry Finger MIME-Version: 1.0 To: Rogerio Luz Coelho CC: linux-wireless@vger.kernel.org, Herton Ronaldo Krzesinski Subject: Re: RTL 8187b - naughty behaviour References: <4BB7660A.3030900@lwfinger.net> <4BB773A9.2070703@lwfinger.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On 04/03/2010 12:04 PM, Rogerio Luz Coelho wrote: > 2010/4/3 Rogerio Luz Coelho : >> 2010/4/3 Larry Finger : >>> On 04/03/2010 11:49 AM, Rogerio Luz Coelho wrote: >>>> >>>> I have a MS-Win7 instalation on this Laptop and it works 100% even at >>>> longer distances than you report,even with walls in between. >>>> >>>> Will do the tcpperf test as soon as I get home. There are other with >>>> the same problem with my exact chip here in Brasil , that is because >>>> one of our leading Laptop vendors uses this config. >>> >>> What is the exact make and model of the device? It might be difficult >>> for me to get one in the US, but one of the rtl8187 developers lives in >>> Brazil. He should be able to find one. >>> >> >> It?s a POSITIVO R430L - Core 2 Duo 4GB RAM This sounds like a computer model. Does the RTL8187B have a separate make/model? >>>> Does it matter that the USB port used in this setting is a connected >>>> to a USB HUB and then to the mother board? >>> >>> Is the hub passive, or is it powered? If the hub is good and not >>> underpowered, it should be OK. > > Have no idea ... how do I find this out? Does it have a +5 V power cord connected to the mains? If so, it is powered. If not, it is passive and all devices that are plugged get their power from the computer port. If the hub is internal, then it is likely powered. Larry