From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: disable touchpad? Date: Fri, 24 Feb 2012 14:55:35 -0800 Message-ID: <1475573.qi4MNDPiM5@dtor-d630.eng.vmware.com> References: <4F47ED34.1070406@xenotime.net> <1396991.aDtuZKT2u4@dtor-d630.eng.vmware.com> <4F480EBA.7020509@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: Received: from mail-pw0-f46.google.com ([209.85.160.46]:43749 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756907Ab2BXWzn (ORCPT ); Fri, 24 Feb 2012 17:55:43 -0500 Received: by pbcun15 with SMTP id un15so3141695pbc.19 for ; Fri, 24 Feb 2012 14:55:42 -0800 (PST) In-Reply-To: <4F480EBA.7020509@canonical.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Chase Douglas Cc: Randy Dunlap , linux-input@vger.kernel.org On Friday, February 24, 2012 02:27:06 PM Chase Douglas wrote: > On 02/24/2012 01:31 PM, Dmitry Torokhov wrote: > > On Friday, February 24, 2012 12:04:04 PM Randy Dunlap wrote: > >> (b) My Toshiba Portege laptop has a touchpad on/off button. Is that > >> supported? > > > > Kernel probably emits one of KEY_TOUCHPAD_* for it; whether it is > > handled > > in userspace I do not know. > > I have heard from some of our engineers who have looked into this that > the interface for these buttons is not standardized. Sometimes the > buttons turn off the touchpad in hardware. Sometimes they emit events > that tell the OS to turn it off, and the OS needs to know how to handle it. > > On top of that, LEDs are sometimes there to tell you if the trackpad is > on or off. These are also not standardized. Sometimes they are hooked up > to the hardware, and when the hardware is off they go off. Sometimes > they are just a plain old LED and the OS needs to turn it on and off. > > Fun... That's because hardware designers were so delighted in beauty that is rfkill buttons, they just had to do the same with touchpads... -- Dmitry