Configure touchpad double-tap
lubuntu at prpcompany.com
Wed Feb 26 23:41:32 UTC 2014
On 2/25/2014 7:00 PM, John Hupp wrote:
> 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
>>>>> 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.
>>>> 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:
>> 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.)
I booted into the *Ubuntu* Live DVD on this laptop, and touchpad
double-tapping performed very smoothly.
Under Ubuntu, synclient reported different values for VertEdgeScroll and
HorizTwoFingerScroll than Lubuntu reported, but changing those settings
to match in Lubuntu did not help the double-tap problem.
I installed Lubuntu Saucy on another laptop, and double-tap worked
beautifully on that machine, but it has an Alps touchpad rather than
I booted into the Lubuntu Trusty 2/14 Daily Build Live DVD on the
problem laptop and found that it had the same problem with double-tap,
but while there I discovered that a *TRIPLE-TAP* reliably yielded the
behavior expected for a double-tap.
So I booted back into Saucy from the hard drive, and found that there
too, a triple-tap reliably yielded the behavior wanted for a double-tap.
It seems like this information could be used to alter the settings to
get expected behavior from a double-tap, but I'm not sure how.
Does this tell anyone something?
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