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

[Peter Hutterer]

On 2/02/13 09:28 , Andy Lutomirski wrote:
> On Fri, Feb 1, 2013 at 3:22 PM, Peter Hutterer <peter.hutterer at who-t.net> wrote:
>> 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.
>
> Privilege.  Editing xorg.conf requires root; setting XI2 properties does not.

fair enough.

>> your desktop environment could handle this in the client, but afaik none of
>> the major ones currently do set this particular setting.
>
> If GNOME ever adds detailed controls like this, I'll be amazed :/

http://who-t.blogspot.com.au/2011/03/custom-input-device-configuration-in.html

no GUI, but it'll get the job done.

Cheers,
   Peter