[PATCH] synaptics: Add TouchpadOff=3 to disable pointer motion only

[Peter Hutterer]

On 2/02/13 03:38 , Andy Lutomirski wrote:
> On Wed, Jan 30, 2013 at 2:57 PM, Peter Hutterer
> <peter.hutterer at who-t.net> wrote:
>> On Tue, Jan 29, 2013 at 08:21:02PM -0800, Andy Lutomirski wrote:
>>> I have a Lenovo laptop with a trackpoint and a touchpad.  I much
>>> prefer the trackpoint for moving the cursor, but the touchpad is
>>> handy for two-finger scrolling.  The Windows driver allows a mode
>>> with gestures only on the touchpad; add such a mode in Linux too.
>>> (Leaving the touchpad fully enabled is no good; palm detection is
>>> spotty at best.)
>>>
>>> Signed-off-by: Andy Lutomirski <luto at amacapital.net>
>>> ---
>>> I'm a little surprised that this apparently can't be done in the XI2
>>> core.  Is there a better way?
>>
>> You should be able to get the same effect by setting ConstantDeceleration on
>> your device to something really high (50 or so will likely do). The touchpad
>> will still submit motion events, but x/y pointer movement will be slowed
>> down enough to never actually change.
>>
>> would that work for you?
>
> That seems to work.  The docs are a bit misleading IMO, though -- this
> decelerates by a factor much more than 50.
>
> Are there any easy-to-use hotplug-aware tools for setting XI2
> properties on a per-device basis?  Doing this in xorg.conf seems kind
> of sad.

why? that's what the InputClass sections were designed for - give you 
configuration that works on a class of devices, even when hotplugged.

your desktop environment could handle this in the client, but afaik none 
of the major ones currently do set this particular setting.

so putting a snippet in xorg.conf.d is certainly the best and most 
appropriate solution.

Cheers,
   Peter