[Wayland-bugs] [Bug 94989] touchpad (on X220) less precise when moving in from the edges

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94989

--- Comment #18 from Michael Biebl <mbiebl at gmail.com> ---
running touchpad-edge-detector, I get

$ sudo touchpad-edge-detector /dev/input/event5
Touchpad SynPS/2 Synaptics TouchPad on /dev/input/event5
Move one finger around the touchpad to detect the actual edges
Kernel says:    x [1472..5472], y [1408..4448]
Touchpad sends: x [1316..5626], y [1355..4826] \^C

Touchpad size as listed by the kernel: 53x23mm
Calculate resolution as:
        x axis: 4000/<width in mm>
        y axis: 3040/<height in mm>

Suggested udev rule:
# <Laptop model description goes here>
evdev:name:SynPS/2 Synaptics
TouchPad:dmi:bvnLENOVO:bvr8DET72WW(1.42):bd02/18/2016:svnLENOVO:pn42914CG:pvrThinkPadX220:rvnLENOVO:rn42914CG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:*
 EVDEV_ABS_00=1316:5626:<x resolution>
 EVDEV_ABS_01=1355:4826:<y resolution>
 EVDEV_ABS_35=1316:5626:<x resolution>
 EVDEV_ABS_36=1355:4826:<y resolution>

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