Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758223AbXELVlR (ORCPT ); Sat, 12 May 2007 17:41:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754252AbXELVlJ (ORCPT ); Sat, 12 May 2007 17:41:09 -0400 Received: from twin.jikos.cz ([213.151.79.26]:56727 "EHLO twin.jikos.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754183AbXELVlI (ORCPT ); Sat, 12 May 2007 17:41:08 -0400 Date: Sat, 12 May 2007 23:40:42 +0200 (CEST) From: Jiri Kosina To: Oliver Neukum cc: Soeren Sonnenburg , linux-usb-devel@lists.sourceforge.net, Linux Kernel , Alan Stern Subject: Re: [linux-usb-devel] converting appletouch to usb autosuspend... In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 963 Lines: 25 On Sat, 12 May 2007, Alan Stern wrote: > > While we are at it usb related powerhogs on this macbook pro are > > uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) > > too... > They would use less power if the UHCI host controller were suspended. > But obviously it cannot be suspended while devices attached to it (such > as the USB keyboard and the appletouch device) remain active. A sidenote for completness, when this has been mentioned: Oliver has been working on autosuspend support for HID devices, he sent me some (yet incomplete) patches some time ago. So autosuspending of USB keyboards/mice/etc. is being worked on. Oliver, do you have any update please? Thanks, -- Jiri Kosina - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/