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?
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