libinput-debug-events - Man Page
debug helper for libinput
Synopsis
libinput debug-events [options]
libinput debug-events [options] --udev <seat>
libinput debug-events [options] [--device] /dev/input/event0 [/dev/input/event1...]
Description
The libinput debug-events tool creates a libinput context and prints all events from these devices.
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
- --device /dev/input/event0
Use the given device(s) with the path backend. The --device argument may be omitted.
- --grab
Exclusively grab all opened devices. This will prevent events from being delivered to the host system.
- --help
Print help
- --quiet
Only print libinput messages, don't print anything from this tool. This is useful in combination with --verbose for internal state debugging.
- --show-keycodes
Key events shown by this tool are partially obfuscated to avoid passwords and other sensitive information showing up in the output. Use the --show-keycodes argument to make all keycodes visible.
- --udev <seat>
Use the udev backend to listen for device notifications on the given seat. The default behavior is equivalent to --udev "seat0".
- --verbose
Use verbose output
libinput configuration options
- --apply-to="pattern"
Configuration options are only applied where the device name matches the pattern. This pattern has no effect on the --disable-sendevents option.
- --disable-sendevents="pattern"
Set the send-events option to disabled for the devices matching patterns. This option is not affected by the --apply-to="pattern" option.
- --enable-drag|--disable-drag
Enable or disable tap-and-drag
- --enable-drag-lock|--disable-drag-lock
Enable (in timeout mode) or disable drag-lock --enable-drag-lock=[sticky|timeout] Enable drag-lock in sticky or timeout mode
- --enable-dwt|--disable-dwt
Enable or disable disable-while-typing
- --enable-dwtp|--disable-dwtp
Enable or disable disable-while-trackpointing
- --enable-left-handed|--disable-left-handed
Enable or disable left handed button configuration
- --enable-middlebutton|--disable-middlebutton
Enable or disable middle button emulation
- --enable-natural-scrolling|--disable-natural-scrolling
Enable or disable natural scrolling
- --enable-scroll-button-lock|--disable-scroll-button-lock
Enable or disable the scroll button lock
- --enable-tap|--disable-tap
Enable or disable tap-to-click
- --set-area="x1/y1 x2/y2"
Set the tablet area to the rectangle described by the two points x1/y1 and x2/y2. All coordinates must be in the range [0.0, 1.0].
- --set-calibration="1.0 0.0 0.0 0.0 1.0 0.0"
Set the first 6 elements of a 3x3 matrix to use for calibration. The third row of the matrix is always "0.0 0.0 0.1".
- --set-click-method=[none|clickfinger|buttonareas]
Set the desired click method
- --set-clickfinger-map=[lrm|lmr]
Set button mapping for clickfinger
- --set-custom-points="<value>;...;<value>"
Sets the n points defining a custom acceleration function The points are defined in a semicolon-separated list of floating point non-negative numbers. Defaults to "0.0;1.0". This only applies to the custom profile.
- --set-custom-step=<value>
Sets the distance along the x-axis between each point, starting from 0. Defaults to 1.0. This only applies to the custom profile.
- --set-custom-type=[fallback|motion|scroll]
Sets the type of the custom acceleration function. Defaults to fallback. This only applies to the custom profile.
- --set-eraser-button-button=[BTN_STYLUS|BTN_STYLUS2|BTN_STYLUS3]
Sets the eraser button button to the given tablet tool button. Only takes effect if combined with --set-eraser-button-mode=on-button-down.
- --set-eraser-button-mode=[default|on-button-down]
Sets the eraser button mode to the given mode.
- --set-pressure-range=<min>:<max>
Set the tablet tool pressure range to min:max. min and max must be in range [0.0, 1.0].
- --set-profile=[adaptive|flat|custom]
Set pointer acceleration profile
- --set-rotation-angle=<degrees>
Set the rotation angle in degrees (0 to 360).
- --set-scroll-button=BTN_MIDDLE
Set the button to the given button code
- --set-scroll-method=[none|twofinger|edge|button]
Set the desired scroll method
- --set-sendevents=[disabled|enabled|disabled-on-external-mouse]
Set the given sendevents mode. This option overrides --disable-sendevents="pattern" for any devices it matches via the --apply-to="pattern" option.
- --set-speed=<value>
Set pointer acceleration speed. The allowed range is [-1, 1]. This only applies to the flat or adaptive profile.
- --set-tap-map=[lrm|lmr]
Set button mapping for tapping
Notes
Events shown by this tool may not correspond to the events seen by a different user of libinput. This tool initializes a separate context.
Libinput
Part of the libinput(1) suite