linux-kernel - Lenovo X220 Touchpad + Trackpoint BIOS issue workaround ?

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Message-ID: <4D9B2CD0.20404@canonical.com>
Date:	Tue, 05 Apr 2011 09:53:04 -0500
From:	Manoj <manoj.iyer@...onical.com>
To:	linux-input@...r.kernel.org
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Lenovo X220 Touchpad + Trackpoint BIOS issue workaround ?

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?

-- 
Manoj Iyer
Ubuntu/Canonical
Hardware Enablement
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