libinput-measure-touchpad-pressure
Section: Misc. Reference Manual Pages (1)
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NAME
libinput-measure-touchpad-pressure - measure pressure properties of devices
SYNOPSIS
libinput measure touchpad-pressure [--help] [options]
[
/dev/input/event0]
DESCRIPTION
The
libinput measure touchpad-pressure
tool measures the pressure of touches on a touchpad. 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
pressure values seen. This data should be attached to any
pressure-related bug report.
For a full description on how libinput's pressure-to-click behavior works, see
the online documentation here:
https://wayland.freedesktop.org/libinput/doc/latest/touchpad_pressure.html
and
https://wayland.freedesktop.org/libinput/doc/latest/palm_detection.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
- --touch-thresholds=down:up
-
Set the logical touch pressure thresholds to
down
and
up,
respectively. When a touch exceeds the pressure in
down
it is considered logically down. If a touch is logically down and goes below
the pressure 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