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<body><span class="vcard"><a class="email" href="mailto:cp@corradoprimier.it" title="cp@corradoprimier.it">cp@corradoprimier.it</a>
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<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Unusable pressure values on ETPS/2 Elantech Touchpad"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100463">bug 100463</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>FIXED
</td>
<td>---
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>RESOLVED
</td>
<td>REOPENED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Unusable pressure values on ETPS/2 Elantech Touchpad"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100463#c25">Comment # 25</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Unusable pressure values on ETPS/2 Elantech Touchpad"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100463">bug 100463</a>
from <span class="vcard"><a class="email" href="mailto:cp@corradoprimier.it" title="cp@corradoprimier.it">cp@corradoprimier.it</a>
</span></b>
<pre>Reopening. I can confirm this is still happening on my Samsung 870Z5G with Arch
Linux and an Elantech touchpad, and it is definitely version-related.
While I was on 1.6.3 everything worked fine, but on both 1.7 and 1.8 the
touchpad is unusable. I am currently using libinput 1.8.0.
I fixed it by following the instructions at
<a href="https://wayland.freedesktop.org/libinput/doc/latest/touchpad_pressure.html">https://wayland.freedesktop.org/libinput/doc/latest/touchpad_pressure.html</a> with
the values found by Paul. I created /etc/udev/hwdb.d/99-touchpad-pressure.hwdb
containing:
svnSAMSUNGELECTRONICSCO.,LTD.:pn870Z5G/880Z5F
LIBINPUT_ATTR_PRESSURE_RANGE=10:8
After a Wayland restart everything works again.
Combinations I tested:
libinput <= 1.6.3 + kernel < 4.12 -> ok
libinput <= 1.6.3 + kernel >= 4.12 -> touchpad not responding
libinput == 1.7.x + kernel == 4.11 -> bad pressure values
libinput == 1.8.0 + kernel == 4.11 -> bad pressure values
libinput == 1.8.0 + kernel == 4.11 + pressure fix -> ok</pre>
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