From owner-freebsd-current Wed Dec 4 16:11:22 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9993137B401 for ; Wed, 4 Dec 2002 16:11:20 -0800 (PST) Received: from msgbas1x.cos.agilent.com (msgbas1x.cos.agilent.com [192.25.240.36]) by mx1.FreeBSD.org (Postfix) with ESMTP id B51DA43EBE for ; Wed, 4 Dec 2002 16:11:19 -0800 (PST) (envelope-from darrylo@soco.agilent.com) Received: from relcos1.cos.agilent.com (relcos1.cos.agilent.com [130.29.152.239]) by msgbas1x.cos.agilent.com (Postfix) with ESMTP id 863A08691; Wed, 4 Dec 2002 17:11:12 -0700 (MST) Received: from mina.soco.agilent.com (mina.soco.agilent.com [141.121.54.157]) by relcos1.cos.agilent.com (Postfix) with ESMTP id 7BB35442; Wed, 4 Dec 2002 17:11:09 -0700 (MST) Received: from mina.soco.agilent.com (darrylo@localhost [127.0.0.1]) by mina.soco.agilent.com (8.9.3 (PHNE_25184)/8.9.3 SMKit7.1.1_Agilent) with ESMTP id QAA29605; Wed, 4 Dec 2002 16:11:08 -0800 (PST) Message-Id: <200212050011.QAA29605@mina.soco.agilent.com> To: "Cliff L. Biffle" Cc: freebsd-current@FreeBSD.ORG Subject: Re: USB issues with Apollo KT133A mobo Reply-To: Darryl Okahata In-Reply-To: Your message of "Wed, 04 Dec 2002 16:00:15 MST." <200212041600.15087.cbiffle@safety.net> Mime-Version: 1.0 (generated by tm-edit 1.7) Content-Type: text/plain; charset=US-ASCII Date: Wed, 04 Dec 2002 16:11:07 -0800 From: Darryl Okahata Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG "Cliff L. Biffle" wrote: > More specifically, all USB devices lose power. The device nodes stay in /dev > and there are no notices to dmesg about the loss until I unplug and replug > them, at which time it says 'port error: restarting port N' where N is > generally 0, depending on which controller it is. It then redetects my > hardware. 1. IIRC, USB ports on KT133A motherboards were buggy (???). 2. Drawing too much power from the USB ports can cause the ports to shut down. The absolute maximum limit is 500mA, which isn't much (some 2.5" USB hard disks can draw MUCH more, which violates the spec, and sometimes works, and sometimes doesn't). Here's another discussion on this: http://groups.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&threadm=ajedc5%24bej%241%40paris.btinternet.com&rnum=1 -- Darryl Okahata darrylo@soco.agilent.com DISCLAIMER: this message is the author's personal opinion and does not constitute the support, opinion, or policy of Agilent Technologies, or of the little green men that have been following him all day. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message