From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: Lenovo X220 Touchpad + Trackpoint BIOS issue workaround ? Date: Tue, 5 Apr 2011 11:30:01 -0700 Message-ID: <20110405183001.GC13086@core.coreip.homeip.net> References: <4D9B2CD0.20404@canonical.com> <4D9B522B.7080201@canonical.com> <20110405173940.GA13086@core.coreip.homeip.net> <4D9B5807.9090406@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-iw0-f174.google.com ([209.85.214.174]:57145 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753907Ab1DESaH (ORCPT ); Tue, 5 Apr 2011 14:30:07 -0400 Received: by iwn34 with SMTP id 34so641773iwn.19 for ; Tue, 05 Apr 2011 11:30:06 -0700 (PDT) Content-Disposition: inline In-Reply-To: <4D9B5807.9090406@canonical.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Manoj Cc: linux-input@vger.kernel.org On Tue, Apr 05, 2011 at 12:57:27PM -0500, Manoj wrote: > > >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 > Ah, so we do know that the touchpad has a pass-through port. I guess you can try booting with i8042.debug with touchpad enabled and disabled and see where exactly we fail to enable trackpoint the the former case. -- Dmitry