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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Imprecise click"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96259#c20">Comment # 20</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Imprecise click"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96259">bug 96259</a>
from <span class="vcard"><a class="email" href="mailto:jeremy9856@gmail.com" title="Paviluf <jeremy9856@gmail.com>"> <span class="fn">Paviluf</span></a>
</span></b>
<pre>(In reply to Peter Hutterer from <a href="show_bug.cgi?id=96259#c19">comment #19</a>)
<span class="quote">> nope, that would just be 1 :)
> I mean just using tp->hysteresis_margin.x = res_x;
> we deal with physical distances in libinput, a margin of res_x equates to
> 1mm in the x direction. the default for the hysteresis is 0.5mm but clearly
> yours needs more.</span >
With this the cursor feel clumpsy
tp->hysteresis_margin.x = res_x;
tp->hysteresis_margin.y = res_y;
<span class="quote">> also, I can't believe I haven't asked this yet: please run the
> touchpad-edge-detector tool and measure your physical touchpad's dimensions.
> If the dimensions are off, that may just explain it.</span >
I measure 100.5x69mm.
Here is the output of touchpad-edge-detector
Touchpad Cypress APA Trackpad (cyapa) on /dev/input/event14
Move one finger around the touchpad to detect the actual edges
Kernel says: x [0..1280], y [0..960]
Touchpad sends: x [0..1279], y [0..959] /^C
Touchpad size as listed by the kernel: 106x64mm
Calculate resolution as:
x axis: 1280/<width in mm>
y axis: 960/<height in mm>
Suggested udev rule:
# <Laptop model description goes here>
evdev:name:Cypress APA Trackpad
(cyapa):dmi:bvncoreboot:bvr:bd12/09/2014:svnHewlett-Packard:pnFalco:pvr1.0:cvnHewlett-Packard:ct3:cvr:*
EVDEV_ABS_00=0:1279:<x resolution>
EVDEV_ABS_01=0:959:<y resolution>
EVDEV_ABS_35=0:1279:<x resolution>
EVDEV_ABS_36=0:959:<y resolution>
It seem that the dimensions are wrong:
physical 100.5x69mm vs kernel 106x64mm</pre>
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