From owner-freebsd-usb@FreeBSD.ORG Fri Apr 11 05:07:40 2014 Return-Path: Delivered-To: freebsd-usb@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 2EE98667 for ; Fri, 11 Apr 2014 05:07:40 +0000 (UTC) Received: from alogt.com (alogt.com [69.36.191.58]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 91B72125F for ; Fri, 11 Apr 2014 05:07:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=alogt.com; s=default; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date; bh=gNTdnIBhWTaCYx1tHg0ncBdsAGY+3hkfnWq58hV0vUo=; b=RTIky9liEjWuUPensGepLnErM6eSR4LXh2u8PX7D6V4eJBZBf6PuQzY7nsErBNSWmgS/6HtFDBp1E1tnhw60LUMlrbkJvAFmcBMDSg+jbURqLwhZBhWC+c7zZXamnKdnMLL6yzT58XI23HSZCzoyCxA3rEfN8glnyl1Oyu6+IGA=; Received: from [182.55.101.96] (port=34002 helo=X220.alogt.com) by sl-508-2.slc.westdc.net with esmtpsa (SSLv3:DHE-RSA-AES128-SHA:128) (Exim 4.82) (envelope-from ) id 1WYTga-003slP-DW; Thu, 10 Apr 2014 23:07:32 -0600 Date: Fri, 11 Apr 2014 13:07:29 +0800 From: Erich Dollansky To: "Daniel O'Connor" Subject: Re: USB 3 devices not reliably connecting at 5Gbps Message-ID: <20140411130729.489d3513@X220.alogt.com> In-Reply-To: References: X-Mailer: Claws Mail 3.9.3 (GTK+ 2.24.22; amd64-portbld-freebsd10.0) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - sl-508-2.slc.westdc.net X-AntiAbuse: Original Domain - freebsd.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - alogt.com X-Get-Message-Sender-Via: sl-508-2.slc.westdc.net: authenticated_id: erichsfreebsdlist@alogt.com X-Source: X-Source-Args: X-Source-Dir: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Apr 2014 05:07:40 -0000 Hi, On Fri, 11 Apr 2014 14:03:19 +0930 "Daniel O'Connor" wrote: > I have a FreeBSD 9.2 system on which I am developing a USB3 data > acquisition card (based on the Cypress FX3) and I have found that it > doesn't reliably connect at 5GBps - quite often it seems to only > connect at 480MBps. > > If I connect it to my macbook pro (running OSX) it reliably connects > at 5Gbps. allow me to share my own experience with USB3. My X220 has a single USB3 port. I have two USB cases in which are 500GB built-in. The cases are identical except of the serial number. But the cases came with two different cables. FreeBSD only connects randomly at full speed when I use the cable which came first on both cases. But it connects always with full speed using the new cable. It is either the error handling of FreeBSD or the quality of the electrical signal. Keep this as a hint in mind when debugging your problem. Erich