Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757054AbYCMRPk (ORCPT ); Thu, 13 Mar 2008 13:15:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756867AbYCMRP0 (ORCPT ); Thu, 13 Mar 2008 13:15:26 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:3909 "EHLO spitz.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756856AbYCMRPZ (ORCPT ); Thu, 13 Mar 2008 13:15:25 -0400 Date: Thu, 13 Mar 2008 18:14:26 +0100 From: Pavel Machek To: David Newall Cc: Jiri Kosina , "Fred ." , linux-kernel@vger.kernel.org Subject: Re: Keys get stuck Message-ID: <20080313171425.GA4840@ucw.cz> References: <47D7B428.6010804@davidnewall.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47D7B428.6010804@davidnewall.com> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1370 Lines: 29 On Wed 2008-03-12 21:14:56, David Newall wrote: > Jiri Kosina wrote: > > Very probably this is due to broken way how X themselves implement > > auto-repeat, instead of using kernel-provided auto-repeat functionality. > > It should be said that X implements auto-repeat out of necessity. While > the kernel can report key down and up events, its further interpretation > of those events is not appropriate. Many combinations of events are > possible, such as keyboard plus mouse, and this precludes the kernel > from providing a full interpretation. It would be wrong for it to even > try. X is the proper place to implement auto-repeat for X. No. hw is proper place to implement autorepeat, and along with some buffering, it has chance to work. Kernel is not real-time, and X are definitely not real-time, while autorepeat is real-time operation. It actually mostly works in ps/2 case. Buffer in hardware means that pretty big interrupt delays can be tolerated without problems. -- (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/