From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964938AbWGJBMw (ORCPT ); Sun, 9 Jul 2006 21:12:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964874AbWGJBMw (ORCPT ); Sun, 9 Jul 2006 21:12:52 -0400 Received: from terminus.zytor.com ([192.83.249.54]:23479 "EHLO terminus.zytor.com") by vger.kernel.org with ESMTP id S964938AbWGJBMv (ORCPT ); Sun, 9 Jul 2006 21:12:51 -0400 Message-ID: <44B1A982.1060700@zytor.com> Date: Sun, 09 Jul 2006 18:12:34 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 1.5.0.4 (X11/20060614) MIME-Version: 1.0 To: Alan Stern CC: Dmitry Torokhov , linux-input@atrey.karlin.mff.cuni.cz, Kernel development list Subject: Re: Magic Alt-SysRq change in 2.6.18-rc1 References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alan Stern wrote: > Dmitry: > > Are you the right person to handle changes in the behavior of Alt-SysRq? > > Before 2.6.18-rc1, I used to be able to use it as follows: > > Press and hold an Alt key, > Press and hold the SysRq key, > Release the Alt key, > Press and release some hot key like S or T or 7, > Repeat the previous step as many times as desired, > Release the SysRq key. > > This scheme doesn't work any more, or if it does, the timing requirements > are now much stricter. In practice I have to hold down all three keys at > the same time; I can't release the Alt key before pressing the hot key. > > This makes thinks very awkward on my laptop machine. Its keyboard > controller doesn't seem to like having three keys pressed simultaneously. > Instead of the expected hotkey behavior, I usually got an error message > from atkbd warning about too many keys being pressed. Getting it to work > as desired is hit-and-miss. > > I would really appreciate going back to the old behavior, where only two > keys needed to be held down at any time. > Looks like the current keyboard code lets you press Alt-SysRq, Alt- without keeping the SysRq key held down, as long as you don't release the Alt key. That seems a lot more user-friendly to me. -hpa