Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760319AbXFDU5b (ORCPT ); Mon, 4 Jun 2007 16:57:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757999AbXFDU5M (ORCPT ); Mon, 4 Jun 2007 16:57:12 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:43685 "EHLO amd.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753549AbXFDU5I (ORCPT ); Mon, 4 Jun 2007 16:57:08 -0400 Date: Mon, 4 Jun 2007 22:57:01 +0200 From: Pavel Machek To: Dmitry Torokhov Cc: Henrique de Moraes Holschuh , Andi Kleen , Jiri Kosina , kernel list Subject: Re: 2.6.22-rc[23]: blinking capslock led, stuck keys? Message-ID: <20070604205701.GD2711@elf.ucw.cz> References: <20070604112426.GA2707@elf.ucw.cz> <20070604130903.GC1971@elf.ucw.cz> <200706041543.49071.ak@suse.de> <20070604135427.GA19466@elf.ucw.cz> <20070604163406.GA1120@khazad-dum.debian.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1774 Lines: 37 On Mon 2007-06-04 13:46:45, Dmitry Torokhov wrote: > On 6/4/07, Henrique de Moraes Holschuh wrote: > >On Mon, 04 Jun 2007, Dmitry Torokhov wrote: > >> >...but I'm not quite sure it is a buggy keyboard. It happens _way_ too > >> >often. Launch the line above and try to do some typing... > >> > >> This used to work fine on my box last time I tried it (the switch > >> itself is offloaded to a keventd and shoud not get in the way) but > >> then they push all kind of ACPI/SMM crap together with KBC so who > >> knows... I should try it again when I get home. > > > >Err... in laptops, almost *always* the KDC is emulated by the embedded > >controller, so I bet you're right on the money, there. It is not "a buggy > >KDC", it is a buggy EC firmware and/or buggy SMBIOS which is a lot more > >common. > > > >And DoS'ing the EC is very high on the Don't Do That list on a laptop. If > >the X60 is only losing keypresses and producing no bigger fireworks, that's > >outstanding behavior (as far as I trust ThinkPad firmware, anyway). > > > >So please throttle anything that might access the KDC way too much (as > >compared to normal keyboard operation by an user). > > What would be reasonable throttling? Once every 100 ms? Well... this thread began with me having problems with leds blinking once per ten seconds. I do not think throttling is going to help. 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/