From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750981AbWFAXng (ORCPT ); Thu, 1 Jun 2006 19:43:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750991AbWFAXng (ORCPT ); Thu, 1 Jun 2006 19:43:36 -0400 Received: from xenotime.net ([66.160.160.81]:33460 "HELO xenotime.net") by vger.kernel.org with SMTP id S1750981AbWFAXng (ORCPT ); Thu, 1 Jun 2006 19:43:36 -0400 Date: Thu, 1 Jun 2006 16:46:17 -0700 From: "Randy.Dunlap" To: Robert Hancock Cc: linux-kernel@vger.kernel.org Subject: Re: USB devices fail unnecessarily on unpowered hubs Message-Id: <20060601164617.b75b484d.rdunlap@xenotime.net> In-Reply-To: <447F79BA.4090904@shaw.ca> References: <6iWP5-2gj-71@gated-at.bofh.it> <6iX82-2UJ-3@gated-at.bofh.it> <447F79BA.4090904@shaw.ca> Organization: YPO4 X-Mailer: Sylpheed version 2.2.5 (GTK+ 2.8.3; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 01 Jun 2006 17:35:22 -0600 Robert Hancock wrote: > linux-os (Dick Johnson) wrote: > > Many, most, perhaps all such devices don't take more power when they > > are "enabled". Everything is already running and sucking up maximum > > current when you plug it in! If the motherboard didn't smoke when > > the device was plugged in, you might just as well let the user use > > it! Perhaps a ** WARNING ** message somewhere, but by golly, they > > got it running or else you wouldn't be able to read its parameters. > > Wrong.. USB devices are not allowed to draw more than some amount (100 > mA I think) of power before the host tells it that it is allowed to > switch into full-power mode. Any device that doesn't do this doesn't > comply with the USB specs. Therefore it is very possible to connect a > device and discover that it can't be enabled. so does Thunderbird on Windows have absolutely no Reply-to-All and no References or In-Reply-To capabilities? --- ~Randy