[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 #13 from Vasily Khoruzhick <anarsoul at gmail.com> ---
(In reply to Peter Hutterer from comment #12)
> 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.

Kernel says:    x [1472..5768], y [1408..5062]
Touchpad sends:    x [1174..5769], y [793..5202]

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