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60 lines
1.5 KiB
Groff
60 lines
1.5 KiB
Groff
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.TH LIBEVDEV-TWEAK-DEVICE "1"
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.SH NAME
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libevdev-tweak-device \- modify an evdev kernel device
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.SH SYNOPSIS
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.B libevdev-tweak-device
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--abs ABS_X [--min a] [--max b] [--res c] [--fuzz d] [--flat e]
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/dev/input/eventX
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.PP
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.B libevdev-tweak-device
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--led LED_NUML --on|--off /dev/input/eventX
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.SH DESCRIPTION
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.PP
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The
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.I libevdev-tweak-device
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tool changes the properties of the evdev kernel device at
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.I /dev/input/eventX.
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Currently this may be used to force an LED on or off, or to change the
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properties of an absolute axis (e.g. its minimum/maximum range or
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resolution). Changes are permanent until the device is removed.
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.SH OPTIONS
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.SS Changing absolute axes
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.TP 8
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.B --abs axis
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Change the given named ABS_ kernel axis, e.g. ABS_X. For a full list, see linux/input.h.
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Each of the options
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.B min, max, res, fuzz, flat
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may be given.
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.TP 8
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.B --min v
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Set the absinfo minimum to the value v
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.TP 8
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.B --max v
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Set the absinfo maximum to the value v
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.TP 8
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.B --res v
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Set the absinfo resolution to the value v
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.TP 8
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.B --fuzz v
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Set the absinfo fuzz to the value v
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.TP 8
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.B --flat v
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Set the absinfo flat to the value v
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.PP
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.SS Toggling LEDs
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.TP 8
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.B --led led
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Change the given LED, e.g. LED_NUML. For a full list, see linux/input.h.
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.TP 8
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.B --on
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Change the LED state to on
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.TP 8
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.B --off
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Change the LED state to off
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.SH NOTES
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.PP
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The kernel does not notify processes about absinfo property changes. Any
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process that has previously obtained the absinfo from the device will remain
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on the old information. This makes using this tool potentially racy, use
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with caution.
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