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45 lines
1.7 KiB
Groff
45 lines
1.7 KiB
Groff
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.TH TOUCHPAD-EDGE-DETECTOR "1"
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.SH NAME
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touchpad-edge-detector \- print the axis ranges for a touchpad device
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.SH SYNOPSIS
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.B touchpad-edge-detector [--help] \fIWxH /dev/input/eventX\fR
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.SH DESCRIPTION
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.PP
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The
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.B touchpad-edge-detector
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tool reads touchpad events from the kernel and records the minimum and
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maximum coordinates based on user input. This is an interactive tool, the
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user must move a finger around the touchpad, attempting to trigger an
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event at all edges of the touchpad.
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.PP
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To terminate the event collection and print a summary, press Ctrl+C. It is
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recommended that the tool is run several times to guarantee a reliable
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result.
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.SH OPTIONS
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.TP 8
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.I WxH
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The width and height of the touchpad in mm. For a touchpad 100mm wide and
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75mm high, the argument is thus \fI100x75\fR. This is a required argument.
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.TP 8
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.I /dev/input/eventX
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The event node of the touchpad to read events from. A list of possible event
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nodes can be obtained with either one of the following commands: \fBlibinput
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record\fR, \fBevemu-record\fR, or \fBevtest\fR. Alternatively the event node
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for a device is listed in the \fBHandlers=\fR line \fI/proc/bus/input/devices\fR.
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This is a required argument.
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.TP 8
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.B --help
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Print a short help description
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.SH NOTES
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.PP
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On completion, this tool prints a summary of the collected events and a
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suggested udev rule. Due to rounding errors it is rare to get an exact match
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for the touchpad's dimensions, but any discrepancy of more than 5mm should
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be corrected with the suggested udev rule.
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.PP
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The udev rule should be simplified and submitted as a pull request to the
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system repository at \fIhttps://github.com/systemd/systemd\fR. For further
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guidance, see the file \fI/usr/lib/udev/hwdb.d/60-evdev.hwdb\fR.
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.SH SEE ALSO
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udev(7)
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