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)