[Wayland-bugs] [Bug 89725] Default settings are unusable with thinkpad x230 touchpad

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89725

--- Comment #12 from Peter Hutterer <peter.hutterer at who-t.net> ---
The min/max provided by the touchpad are usually less than what is actually
provided. Run libevdev's touchpad-edge-detector to figure out the real min/max
for the touchpad and then divide the range by the resolution. With the one
announced by the driver the touchpad should only be ~27mm high, even if we
account for a 10-20% under-reporting on the range we still don't get near the
45 you measured.

The x220t touchpad is equally bad. Real measured width is [1316, 5627]@75
units/mm. Which would be 57.5mm, real size is 75mm. Height is [1355, 4826]@129
-> 27mm when it's really 42mm.
That aside, I don't notice the jumping problem on the x220t much, and the
coordinates seem to be close enough together.

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