[Wayland-bugs] [Bug 95417] AlpsPS/2 ALPS DualPoint TouchPad two finger scrolling not working on edge

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed May 25 06:26:02 UTC 2016


https://bugs.freedesktop.org/show_bug.cgi?id=95417

--- Comment #4 from Ignacio Casal Quinteiro <nacho.resa at gmail.com> ---
This is what the tool says:

[nacho at winterfell ~]$ sudo touchpad-edge-detector /dev/input/event6 
Touchpad AlpsPS/2 ALPS DualPoint TouchPad on /dev/input/event6
Move one finger around the touchpad to detect the actual edges
Kernel says:    x [0..2000], y [0..1400]
Touchpad sends: x [0..1960], y [113..1436] /^C

Touchpad size as listed by the kernel: 80x43mm
Calculate resolution as:
        x axis: 2000/<width in mm>
        y axis: 1400/<height in mm>

Suggested udev rule:
# <Laptop model description goes here>
evdev:name:AlpsPS/2 ALPS DualPoint
TouchPad:dmi:bvnDellInc.:bvrA14:bd08/19/2015:svnDellInc.:pnPrecisionM4700:pvr01:rvnDellInc.:rn082H3V:rvrA00:cvnDellInc.:ct9:cvr:*
 EVDEV_ABS_00=0:1960:<x resolution>
 EVDEV_ABS_01=113:1436:<y resolution>
 EVDEV_ABS_35=0:1960:<x resolution>
 EVDEV_ABS_36=113:1436:<y resolution>

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