From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tommy Will Subject: Re: PROBLEM: [Dell LATITUDE E7440] ALPS touchpad events are not routed into /dev/input/mice and /dev/input/mouseX Date: Fri, 7 Feb 2014 16:18:00 +0800 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: Received: from mail-lb0-f175.google.com ([209.85.217.175]:41686 "EHLO mail-lb0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750801AbaBGISC convert rfc822-to-8bit (ORCPT ); Fri, 7 Feb 2014 03:18:02 -0500 Received: by mail-lb0-f175.google.com with SMTP id p9so2339691lbv.6 for ; Fri, 07 Feb 2014 00:18:00 -0800 (PST) Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: qehgt0@gmail.com Cc: "linux-input@vger.kernel.org" Hi Vasily, Thanks for your mail & information. We would start the investigation and give you feedback later. Please wait. > The issues occurs on every kernel after > 1302bac33d9e88cd43e482191a806998f3ed43cc commit. Before the commit, this touchpad device was detected as PS/2 mouse and "cat /dev/input/mice" shows data when the touchpad is used. > After the commit, there are no events from the touchpad in /dev/input/mice or /dev/input/mouseX files anymore. > > According to drivers/input/mouse/alps.c source file, all devices with signatures "ec[0] == 0x88 && ec[1] == 0x08" are treated as "Rushmore touchpads". This touchpad has E7 signature of "73-03-0A" and EC signature of "88-08-22", and it looks like that V5 protocol (not > "Rushmore") should be used here. If V5 protocol is forced to use for this device then everything works fine. > > The patch is trivial, but I'm not sure how to properly separate "Rushmore" and "V5" devices. Are there any datasheets or experts to help me with it? > I checked the E7 & EC information and think it should be a Rushmore device. Could you please let me know after you use V5 protocol, if touchpad still be recognized as "AlpsPS/2 ALPS DualPoint TouchPad" or returns to "PS/2 Generic Mouse" ? Thanks -- Best Regards, Tommy