From: Manoj <manoj.iyer@canonical.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Subject: Re: Lenovo X220 Touchpad + Trackpoint BIOS issue workaround ?
Date: Tue, 05 Apr 2011 12:57:27 -0500 [thread overview]
Message-ID: <4D9B5807.9090406@canonical.com> (raw)
In-Reply-To: <20110405173940.GA13086@core.coreip.homeip.net>
> 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?
>>>
>>>
>
next prev parent reply other threads:[~2011-04-05 17:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-05 14:53 Lenovo X220 Touchpad + Trackpoint BIOS issue workaround ? Manoj
2011-04-05 17:32 ` Manoj
2011-04-05 17:39 ` Dmitry Torokhov
2011-04-05 17:57 ` Manoj [this message]
2011-04-05 18:30 ` Dmitry Torokhov
2011-04-05 22:02 ` Manoj
2011-04-05 22:19 ` Manoj
2011-04-05 22:40 ` Manoj
2011-04-06 17:03 ` Manoj
2011-04-06 17:12 ` Dmitry Torokhov
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