From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750782AbWGLH05 (ORCPT ); Wed, 12 Jul 2006 03:26:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750787AbWGLH05 (ORCPT ); Wed, 12 Jul 2006 03:26:57 -0400 Received: from mail.df.lth.se ([194.47.250.12]:932 "EHLO df.lth.se") by vger.kernel.org with ESMTP id S1750782AbWGLH04 (ORCPT ); Wed, 12 Jul 2006 03:26:56 -0400 Date: Wed, 12 Jul 2006 09:26:28 +0200 From: Fredrik Roubert To: Roman Zippel Cc: Andrew Morton , pavel@ucw.cz, stern@rowland.harvard.edu, dmitry.torokhov@gmail.com, linux-input@atrey.karlin.mff.cuni.cz, linux-kernel@vger.kernel.org Subject: Re: [patch] Re: Magic Alt-SysRq change in 2.6.18-rc1 Message-ID: <20060712072628.GB5869@igloo.df.lth.se> Mail-Followup-To: Roman Zippel , Andrew Morton , pavel@ucw.cz, stern@rowland.harvard.edu, dmitry.torokhov@gmail.com, linux-input@atrey.karlin.mff.cuni.cz, linux-kernel@vger.kernel.org References: <20060710094414.GD1640@igloo.df.lth.se> <20060711124105.GA2474@elf.ucw.cz> <20060711224225.GC1732@elf.ucw.cz> <20060711165003.25265bb7.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-PGP-Public-Key: http://www.df.lth.se/~roubert/pubkey.txt Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed 12 Jul 02:16 CEST 2006, Roman Zippel wrote: > > Nack your nack! The patch in 2.6.18-rc1 makes sysrq work on machines on > > which it *did not work at all*. If that makes it harder to type but still > > possible to type on other machines, well, we win. > > Why can't we even _try_ to preserve compatibility? :-( First, please note that the documented behaviour (You press the key combo 'ALT-SysRq-'.) still works. The problem at hand is that not all keyboards can handle this many keys pressed at once, and that there also are keyboards broken in other ways. The work-around suggested in the documentation ([Y]ou might have better luck with "press Alt", "press SysRq", "release Alt", "press ", release everything.) does not work with keyboards that sends the make and break codes for SysRq immediately after another, and this was the reason for changing the behaviour (for broken keyboards) in 2.6.18-rc1. The new behaviour works with every keyboard the people involved in this discussion has heard of. That the documentation wasn't updated with the new work-around key combination for broken keyboards was a mistake. Cheers // Fredrik Roubert -- Visserij 192 | +32 473 344527 / +46 708 776974 BE-9000 Gent | http://www.df.lth.se/~roubert/