Comment 28 for bug 1825499

you'll need to run it against the correct event node, run libinput record (libinput-utils.rpm) without arguments, it'll give you a list of devices. Pick your touchpad from that list. Note that you may have 2 touchpad kernel devices, only one of which will send events. So while libinput record is running, touch the device - if you see events scroll past that's the right event node.

Once you identified the device node, use that same event node for the touchpad-edge-detector