Configure touchpad double-tap

John Hupp lubuntu at
Wed Feb 26 00:00:24 UTC 2014

On 2/22/2014 8:24 PM, John Hupp wrote:
> On 2/20/2014 12:07 PM, John Hupp wrote:
>> On 2/20/2014 3:05 AM, Ali Linx wrote:
>>> On 02/20/2014 05:26 AM, John Hupp wrote:
>>>> I just installed Lubuntu Saucy on a Lenovo 3000 laptop and I'm 
>>>> finding that touchpad double-tap does not seem to work (Synaptics 
>>>> touchpad).
>>>> I've seen a few other complaints on related topics but haven't 
>>>> found anything that really defines what can be configured on 
>>>> touchpads and how.
>>>> Options?
>>> Hi,
>>> AskUbuntu? Ubuntu Forums?
>>> Try :)
>> I could have added that one of the posts I saw said that double-tap 
>> worked fine in Ubuntu, but not in Lubuntu.
>> So it would seem that this list ought to be a good place to bring 
>> this up.
> After further playing around, it seemed that double-tap was not 
> disabled, but required *VERY* fast tapping.
> I found synclient, which is installed in Lubuntu Saucy and supposed to 
> control Synaptics touchpad behavior, with documentation at 
> That documentation indicates that the related config file is at 
> /etc/X11/xorg.conf, but that doesn't exist on my machine, so at the 
> moment I don't know what the universal/user configuration locations are.
> synclient -l reports MaxDoubleTapTime=180 initially, and it allowed me 
> to set 'synclient MaxDoubleTapTime=360.'  I'm guessing that it could 
> probably be set as high as 1000.
> This seemed to help, but double-tap is still unreliable: sometimes it 
> seems to require unreasonably forceful tapping.
> synclient also reports settings for:
>     PressureMotionMinZ
>     PressureMotionMaxZ
>     PressureMotionMinFactor
>     PressureMotionMaxFactor
> But it is not self-evident to me what behaviors those settings are 
> supposed to govern and if any of them would set the touchpad to 
> respond to a lighter touch.
> I have not yet found any better documentation, and maybe that would 
> help me achieve better control.  So I'm still open to further help!

I know more now but still don't have a resolution.

Documentation of the settings reported and governed per-session by 
synclient are at

FingerLow and FingerHigh are the settings that should govern 
sensitivity, if that is my issue.

Default settings are automatically configured by Xorg, but may be 
temporarily changed during a session via synclient.  Make permanent 
changes by editing /usr/share/X11/xorg.conf.d/50-synaptics.conf and 
adding Options to the existing InputClass section that has the 
Identifier "touchpad catchall."  An example with Options for FingerLow 
and FingerHigh:

Section "InputClass"
     Identifier "touchpad catchall"
     Driver "synaptics"
     MatchIsTouchpad "on"
     MatchDevicePath "/dev/input/event*"
     Option "FingerLow" "10"
     Option "FingerHigh" "16"

This laptop is dual-booting Saucy with Windows Vista, and so far I have 
not been able to configure the touchpad so that it double-taps easily 
and consistently/reliably the way it does in Windows.  (Which is also to 
say that I know that the touchpad hardware is OK because it works fine 
in Windows.)

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