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

6       libevdev-tweak-device - modify an evdev kernel device
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SYNOPSIS

9       libevdev-tweak-device --abs ABS_X [--min a] [--max b] [--res c] [--fuzz
10       d]  [--flat  e]  /dev/input/eventX  libevdev-tweak-device  --resolution
11       res[,yres] /dev/input/eventX
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13       libevdev-tweak-device --led LED_NUML --on|--off /dev/input/eventX
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DESCRIPTION

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

23   Changing absolute axes
24       --abs axis
25               Change the given named ABS_ kernel axis, e.g. ABS_X. For a full
26               list, see linux/input.h.  Each of the options  min,  max,  res,
27               fuzz, flat may be given.
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29       --min v Set the absinfo minimum to the value v
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31       --max v Set the absinfo maximum to the value v
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33       --res v Set the absinfo resolution to the value v
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35       --fuzz v
36               Set the absinfo fuzz to the value v
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38       --flat v
39               Set the absinfo flat to the value v
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41   Changing the x/y resolution
42       --resolution res[,yres]
43               Changes  the resolution of the ABS_X, ABS_MT_POSITION_X, ABS_Y,
44               and ABS_MT_POSITION_Y axis to the given resolution. If only one
45               resolution  value is provided, both x and y axis are set to the
46               same  resolution,  otherwise  the  first  resolution  value  is
47               applied to the x axes and the second value to the y axes.
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49   Toggling LEDs
50       --led led
51               Change  the  given  LED,  e.g.  LED_NUML.  For a full list, see
52               linux/input.h.
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54       --on    Change the LED state to on
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56       --off   Change the LED state to off
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NOTES

59       The kernel does not notify processes about  absinfo  property  changes.
60       Any  process  that  has previously obtained the absinfo from the device
61       will remain on the old information. This makes using this  tool  poten‐
62       tially racy, use with caution.
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66                                                      LIBEVDEV-TWEAK-DEVICE(1)
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