From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manoj Subject: Re: Lenovo X220 Touchpad + Trackpoint BIOS issue workaround ? Date: Tue, 05 Apr 2011 12:57:27 -0500 Message-ID: <4D9B5807.9090406@canonical.com> References: <4D9B2CD0.20404@canonical.com> <4D9B522B.7080201@canonical.com> <20110405173940.GA13086@core.coreip.homeip.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from adelie.canonical.com ([91.189.90.139]:37004 "EHLO adelie.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750807Ab1DER5a (ORCPT ); Tue, 5 Apr 2011 13:57:30 -0400 In-Reply-To: <20110405173940.GA13086@core.coreip.homeip.net> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Dmitry Torokhov Cc: linux-input@vger.kernel.org > When both are enabled in BIOS what protocol does the kernel use to talk > to the touchpad? Does it use synaptics protocol? Yes it uses Synaptics TouchPad. if (max_proto > PSMOUSE_PS2 && synaptics_detect(p .. etc... I should say here that the trackpoint is not detected. And sometimes (very random) the trackpad is detected as PS/2 Mouse when touchpad and trackpoint are enabled in the BIOS... here is what it looks like in dmesg when it shows up as PS/2 Mouse instead of TPPS/2 IBM TrackPoint. [ 9.797624] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input8 [ 10.480034] serio: Synaptics pass-through port at isa0060/serio1/input0 [ 10.536122] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input9 [ 34.507201] input: PS/2 Generic Mouse as /devices/platform/i8042/serio1/serio2/input/input10 > > Thanks. > >> Manoj Iyer >> Ubuntu/Canonical >> Hardware Enablement >> >> On 04/05/2011 09:53 AM, Manoj wrote: >>> The Lenovo X220 has a touch pad and a track point. I would like to get >>> some clues as to if there is any work around in the kernel for the issue >>> I am seeing below: >>> >>> Case 1: Touchpad and Trackpoint enabled in BIOS. >>> ================================================ >>> In this case the touchpad works correctly, but the trackpoint is not >>> detected at all. Some times after random number of reboots, the >>> trackpoint will start to respond approximately 15mts after X starts. But >>> the mouse will be detected as PS2 Generic Mouse. >>> >>> Case 2: Touchpad Disabled Trackpoint Enabled in BIOS >>> ====================================================== >>> In this case the trackpoint works as expected, and it is detected as >>> TPPS/2 IBM TrackPoint. >>> [ 9.675396] input: TPPS/2 IBM TrackPoint as >>> /devices/platform/i8042/serio1/input/input9 >>> >>> I suspect this is a BIOS bug? Is it possible to work around this in the >>> kernel? >>> >>> >