From owner-freebsd-usb@FreeBSD.ORG  Fri Apr 11 06:06:04 2014
Return-Path: <owner-freebsd-usb@FreeBSD.ORG>
Delivered-To: freebsd-usb@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 ESMTPS id 84C11199
 for <freebsd-usb@freebsd.org>; Fri, 11 Apr 2014 06:06:04 +0000 (UTC)
Received: from mail.turbocat.net (mail.turbocat.net
 [IPv6:2a01:4f8:d16:4514::2])
 (using TLSv1.1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 487C1184D
 for <freebsd-usb@freebsd.org>; Fri, 11 Apr 2014 06:06:04 +0000 (UTC)
Received: from laptop015.home.selasky.org
 (cm-176.74.213.204.customer.telag.net [176.74.213.204])
 (using TLSv1 with cipher ECDHE-RSA-AES128-SHA (128/128 bits))
 (No client certificate requested)
 by mail.turbocat.net (Postfix) with ESMTPSA id 2AA111FE027;
 Fri, 11 Apr 2014 08:06:01 +0200 (CEST)
Message-ID: <5347867B.2040001@selasky.org>
Date: Fri, 11 Apr 2014 08:06:51 +0200
From: Hans Petter Selasky <hps@selasky.org>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:24.0) Gecko/20100101 Thunderbird/24.1.0
MIME-Version: 1.0
To: Erich Dollansky <erichsfreebsdlist@alogt.com>, 
 Daniel O'Connor <doconnor@gsoft.com.au>
Subject: Re: USB 3 devices not reliably connecting at 5Gbps
References: <A9616810-7BD9-49FC-BFA7-44206E4CCAC1@gsoft.com.au>
 <20140411130729.489d3513@X220.alogt.com>
In-Reply-To: <20140411130729.489d3513@X220.alogt.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-usb@freebsd.org
X-BeenThere: freebsd-usb@freebsd.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: FreeBSD support for USB <freebsd-usb.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-usb>,
 <mailto:freebsd-usb-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-usb/>
List-Post: <mailto:freebsd-usb@freebsd.org>
List-Help: <mailto:freebsd-usb-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-usb>,
 <mailto:freebsd-usb-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Apr 2014 06:06:04 -0000

On 04/11/14 07:07, Erich Dollansky wrote:
> It is either the error handling of FreeBSD or the quality of the
> electrical signal.

Hi,

The port speed is decided by the hardware after port reset.

Setting "sysctl hw.usb.uhub.debug=15" should reveal some more 
information about the port reset sequence.

Please also ensure you are running 9/10-stable when testing, hence there 
are some minor fixes for XHCI every now and then.

Try to collect some more logs from UHUB driver first. Compare bad and 
good case.

--HPS