1TOUCHPAD-EDGE-DETECTOR(1) General Commands Manual TOUCHPAD-EDGE-DETECTOR(1)
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6 touchpad-edge-detector - print the axis ranges for a touchpad device
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9 touchpad-edge-detector [--help] WxH /dev/input/eventX
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12 The touchpad-edge-detector tool reads touchpad events from the kernel
13 and records the minimum and maximum coordinates based on user input.
14 This is an interactive tool, the user must move a finger around the
15 touchpad, attempting to trigger an event at all edges of the touchpad.
16 To terminate the event collection and print a summary, press Ctrl+C. It
18 is recommended that the tool is run several times to guarantee a reli‐
19 able result.
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22 WxH The width and height of the touchpad in mm. For a touchpad
23 100mm wide and 75mm high, the argument is thus 100x75. This is
24 a required argument.
25 /dev/input/eventX
27 The event node of the touchpad to read events from. A list of
28 possible event nodes can be obtained with either one of the
29 following commands: libinput record, evemu-record, or evtest.
30 Alternatively the event node for a device is listed in the Han‐
31 dlers= line /proc/bus/input/devices. This is a required argu‐
32 ment.
33 --help Print a short help description
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37 On completion, this tool prints a summary of the collected events and a
38 suggested udev rule. Due to rounding errors it is rare to get an exact
39 match for the touchpad's dimensions, but any discrepancy of more than
40 5mm should be corrected with the suggested udev rule.
41 The udev rule should be simplified and submitted as a pull request to
43 the system repository at https://github.com/systemd/systemd. For fur‐
44 ther guidance, see the file /usr/lib/udev/hwdb.d/60-evdev.hwdb.
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47 udev(7)
48 TOUCHPAD-EDGE-DETECTOR(1)