From owner-freebsd-questions@FreeBSD.ORG Fri Apr 9 11:38:51 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 370E11065670 for ; Fri, 9 Apr 2010 11:38:51 +0000 (UTC) (envelope-from wblock@wonkity.com) Received: from wonkity.com (wonkity.com [67.158.26.137]) by mx1.freebsd.org (Postfix) with ESMTP id 8596A8FC13 for ; Fri, 9 Apr 2010 11:38:49 +0000 (UTC) Received: from wonkity.com (localhost [127.0.0.1]) by wonkity.com (8.14.3/8.14.3) with ESMTP id o39BPO9j042988; Fri, 9 Apr 2010 05:25:24 -0600 (MDT) (envelope-from wblock@wonkity.com) Received: from localhost (wblock@localhost) by wonkity.com (8.14.3/8.14.3/Submit) with ESMTP id o39BPOd8042985; Fri, 9 Apr 2010 05:25:24 -0600 (MDT) (envelope-from wblock@wonkity.com) Date: Fri, 9 Apr 2010 05:25:24 -0600 (MDT) From: Warren Block To: perryh@pluto.rain.com In-Reply-To: <4bbedc81.G0j71lonOCUqR/vZ%perryh@pluto.rain.com> Message-ID: References: <4BBE8DB1.8040905@joseph-a-nagy-jr.us> <4BBE9470.1040607@joseph-a-nagy-jr.us> <4BBEB5BC.3000509@joseph-a-nagy-jr.us> <4bbedc81.G0j71lonOCUqR/vZ%perryh@pluto.rain.com> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (wonkity.com [127.0.0.1]); Fri, 09 Apr 2010 05:25:24 -0600 (MDT) Cc: freebsd-questions@freebsd.org Subject: Re: USB Powered Speakers X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Apr 2010 11:38:51 -0000 On Fri, 9 Apr 2010, perryh@pluto.rain.com wrote: > Programmer In Training wrote: > >> ... they are only attached for power purposes ... > >> Input power: DC 5V 500mA > > Any chance these speakers need a USB 2.0 port, and all the ports > on your FreeBSD box are 1.x? I don't remember the USB power spec > offhand, but 2.5W may exceed what a USB 1.x port can supply -- > a limit that applies regardless of the system's overall power > provisioning. 500 mA is 5 unit loads for USB 2.0, or powered hub territory. The device has to request that high power mode, and the system can say no and disable the port. That should show in /var/log/messages. -Warren Block * Rapid City, South Dakota USA