Date: Wed, 4 Dec 2002 21:09:26 -0700 From: "Cliff L. Biffle" <cbiffle@safety.net> To: Darryl Okahata <darrylo@soco.agilent.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: USB issues with Apollo KT133A mobo Message-ID: <200212042109.26410.cbiffle@safety.net> In-Reply-To: <200212050011.QAA29605@mina.soco.agilent.com> References: <200212050011.QAA29605@mina.soco.agilent.com>
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On Wednesday 04 December 2002 05:11 pm, Darryl Okahata wrote: > 1. IIRC, USB ports on KT133A motherboards were buggy (???). Could be. The ATA controller was also flaking out under 4.7, but is solid as a rock under 5.0-DP2, which is why I'm sticking with it despite other potential bugs. I can burn CDs now! > 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). The behavior persists with just an optical USB mouse, which can't possibly be sucking more than a few dozen mills. (I hope.) In the discussion link you sent me, they discuss the controller disabling the port due to excessive current draw...would it re-enable the port when I simply un/replug the mouse? Normally I'd expect that to require a reboot. (The mouse does come back when I remove it and reinsert it, and generally X doesn't even notice.) The KT133 discussion suggests it's a hardware problem, which wouldn't surprise me...this particular mobo is a very early Athlon board, and the chipset may be buggy. -Cliff L. Biffle To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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