Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764149AbXJTSdR (ORCPT ); Sat, 20 Oct 2007 14:33:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757331AbXJTSdG (ORCPT ); Sat, 20 Oct 2007 14:33:06 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:55798 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756506AbXJTSdF (ORCPT ); Sat, 20 Oct 2007 14:33:05 -0400 Date: Sat, 20 Oct 2007 20:33:09 +0200 From: Pavel Machek To: "legolas558@users.sourceforge.net" Cc: linux-kernel@vger.kernel.org Subject: Re: Laptop keyboard unusable when ACPI is active was Re: [2.6.22] i8042, ACPI, ipw2100 and issues reported by psmouse.c atkbd.c Message-ID: <20071020183309.GB11373@elf.ucw.cz> References: <47001841.1000107@users.sourceforge.net> <470DD906.9090504@users.sourceforge.net> <20071018195202.GA6962@ucw.cz> <4719EAEB.6060703@users.sourceforge.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4719EAEB.6060703@users.sourceforge.net> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.16 (2007-06-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 922 Lines: 28 Hi! > > Try disabling acpi embedded controller. > > > How can I accomplish this? Are you referring to the i8042? rmmod acpi_ec or how is it called. But I'm not sure how easy this is. > > Try watching keyboard interrupts. Are they lost? > > > I am pretty sure they are. I think that ACPI pauses interrupts for a > while (100ms?) and so some keyboard interrupts are lost. input layer can poll keyboard on its own, perhaps that helps? Can you try to measure the interrupt latencies? Does this happen in init=/bin/bash? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/