libinput-measure-touch-size(1)                         General Commands Manual

NAME
       libinput-measure-touch-size - measure touch size and orientation of
       devices

SYNOPSIS
       libinput measure touch-size [--help] [options] [/dev/input/event0]

DESCRIPTION
       The libinput measure touch-size tool measures the size and orientation
       of a touch as provided by the kernel.  This is an interactive tool.
       When executed, the tool will prompt the user to interact with the touch
       device. On termination, the tool prints a summary of the values seen.
       This data should be attached to any touch-size-related bug report.

       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 touch-capable
       device and uses that node.

       --help  Print help

       --touch-thresholds="down:up"
               Set the logical touch size thresholds to down and up,
               respectively. When a touch exceeds the size in down it is
               considered logically down. If a touch is logically down and
               goes below the size in up, it is considered logically up. The
               thresholds have to be in device-specific pressure values and it
               is required that down >= up.

       --palm-threshold=N
               Assume a palm threshold of N.  The threshold has to be in
               device-specific pressure values.

       If the touch-thresholds or the palm-threshold are not provided, this
       tool uses the thresholds provided by the device quirks (if any) or the
       built-in defaults.

LIBINPUT
       Part of the libinput(1) suite

                                                libinput-measure-touch-size(1)