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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - AlpsPS/2 ALPS DualPoint TouchPad two finger scrolling not working on edge"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95417#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - AlpsPS/2 ALPS DualPoint TouchPad two finger scrolling not working on edge"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95417">bug 95417</a>
from <span class="vcard"><a class="email" href="mailto:nacho.resa@gmail.com" title="Ignacio Casal Quinteiro <nacho.resa@gmail.com>"> <span class="fn">Ignacio Casal Quinteiro</span></a>
</span></b>
<pre>This is what the tool says:
[nacho@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></pre>
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