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libinput-measure-touchpad-tap(1)                               libinput Manual


NAME

       libinput-measure-touchpad-tap - measure tap-to-click properties of
       devices


SYNOPSIS

       libinput measure touchpad-tap [--help] [--format=<format>]
       [/dev/input/event0]


DESCRIPTION

       The libinput measure touchpad-tap tool measures properties of the
       tap-to-click behavior of the user. This is an interactive tool. When
       executed, the tool will prompt the user to interact with the touchpad.
       On termination, the tool prints a summary of the tap interactions seen.
       This data should be attached to any tap-related bug report.

       For a full description on how libinput's tap-to-click behavior works,
       see the online documentation here:
       https://wayland.freedesktop.org/libinput/doc/latest/tapping.html

       This is a debugging tool only, its output may change at any time. Do
       not rely on the output.

       This tool usually needs to be run as root to have access to the
       /dev/input/eventX nodes.


OPTIONS

       If a device node is given, this tool opens that device node. Otherwise,
       this tool searches for the first node that looks like a touchpad and
       uses that node.

       --help  Print help

       --format=summary|dat
               Specify the data format to be printed. The default (or if
               --format is omitted) is "summary". See section DATA FORMATS


DATA FORMATS

       This section describes the data formats printed with the --format
       commandline argument. Note that any of the output may change at any
       time.

       summary
           The summary format prints a summary of the data collected. This
           format is useful to get a quick overview of a user's tapping
           behavior and why some taps may or may not be detected.

       dat
           The dat format prints the touch sequence data (raw and processed)
           in column-style format, suitable for processing by other tools such
           as gnuplot(1).  The data is aligned in one row per touch with each
           column containing a separate data entry.
           libinput-measure-touchpad-tap prints comments at the top of the
           file to describe each column.

           WARNING: The data contained in the output is grouped by different
           sort orders. For example, the first few columns may list tap
           information in the 'natural' sort order (i.e. as they occurred),
           the data in the next few columns may list tap information sorted by
           the delta time between touch down and touch up.  Comparing columns
           across these group boundaries will compare data of two different
           touch points and result in invalid analysis.


BUGS

       This tool does not take finger pressure into account. The tap it
       detects may be different to those detected by libinput if libinput's
       pressure thresholds differ significantly to the kernel's pressure
       thresholds.


LIBINPUT

       Part of the libinput(1) suite

libinput 1.23.0                               libinput-measure-touchpad-tap(1)

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