LIBEVDEV-TWEAK-DEVICE(1)    General Commands Manual   LIBEVDEV-TWEAK-DEVICE(1)

NAME
       libevdev-tweak-device - modify an evdev kernel device

SYNOPSIS
       libevdev-tweak-device --abs ABS_X [--min a] [--max b] [--res c] [--fuzz
       d] [--flat e] /dev/input/eventX libevdev-tweak-device --resolution
       res[,yres] /dev/input/eventX

       libevdev-tweak-device --led LED_NUML --on|--off /dev/input/eventX

DESCRIPTION
       The libevdev-tweak-device tool changes the properties of the evdev
       kernel device at /dev/input/eventX.  Currently this may be used to
       force an LED on or off, or to change the properties of an absolute axis
       (e.g. its minimum/maximum range or resolution). Changes are permanent
       until the device is removed.

OPTIONS
   Changing absolute axes
       --abs axis
               Change the given named ABS_ kernel axis, e.g. ABS_X. For a full
               list, see linux/input.h.  Each of the options min, max, res,
               fuzz, flat may be given.

       --min v Set the absinfo minimum to the value v

       --max v Set the absinfo maximum to the value v

       --res v Set the absinfo resolution to the value v

       --fuzz v
               Set the absinfo fuzz to the value v

       --flat v
               Set the absinfo flat to the value v

   Changing the x/y resolution
       --resolution res[,yres]
               Changes the resolution of the ABS_X, ABS_MT_POSITION_X, ABS_Y,
               and ABS_MT_POSITION_Y axis to the given resolution. If only one
               resolution value is provided, both x and y axis are set to the
               same resolution, otherwise the first resolution value is
               applied to the x axes and the second value to the y axes.

   Toggling LEDs
       --led led
               Change the given LED, e.g. LED_NUML. For a full list, see
               linux/input.h.

       --on    Change the LED state to on

       --off   Change the LED state to off

NOTES
       The kernel does not notify processes about absinfo property changes.
       Any process that has previously obtained the absinfo from the device
       will remain on the old information. This makes using this tool
       potentially racy, use with caution.

                                                      LIBEVDEV-TWEAK-DEVICE(1)