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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Logitech K400: double tap on touchpad is filtered by debouncing code"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106534">106534</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Logitech K400: double tap on touchpad is filtered by debouncing code
</td>
</tr>
<tr>
<th>Product</th>
<td>Wayland
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>libinput
</td>
</tr>
<tr>
<th>Assignee</th>
<td>wayland-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>noabody@yahoo.com
</td>
</tr>
<tr>
<th>CC</th>
<td>1762536@trash-mail.com, peter.hutterer@who-t.net, wayland-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Depends on</th>
<td>105974
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=139584" name="attach_139584" title="Patch for source package in Cosmic 1.10.6">attachment 139584</a> <a href="attachment.cgi?id=139584&action=edit" title="Patch for source package in Cosmic 1.10.6">[details]</a></span>
Patch for source package in Cosmic 1.10.6
+++ This bug was initially created as a clone of <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Logitech K400: double tap on touchpad is filtered by debouncing code"
href="show_bug.cgi?id=105974">Bug #105974</a> +++
+++ Which is an extension of <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - My wireless all-in-one (keyboard/mouse) requires a triple-tap to highlight a word"
href="show_bug.cgi?id=104415">bug 104415</a> +++
this is a copy of:
<a href="https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1762536">https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1762536</a>
Affects Logitech Wireless Keyboard/Touchpad combo devices.
libinput:mouse:input:b0003v046Dp404B*
LIBINPUT_MODEL_LOGITECH_K400r=1
libinput:mouse:input:b0003v046Dp404C*
LIBINPUT_MODEL_LOGITECH_K830=1
libinput:mouse:input:b0003v046Dp404D*
LIBINPUT_MODEL_LOGITECH_K400plus=1
Conglomerated as the code is clearly a workaround not designed for a large
database of affected hardware. Apparently filtering devices from debouncing
was unexpected. As-is, patching is inaccessible in the common use arena.
libinput:mouse:input:b0003v046Dp404*
LIBINPUT_MODEL_LOGITECH_KBTP=1
if (device->model_flags &
(EVDEV_MODEL_MS_NANO_TRANSCEIVER|EVDEV_MODEL_LOGITECH_K400|EVDEV_MODEL_LOGITECH_KBTP))
{
dispatch->debounce.state = DEBOUNCE_STATE_DISABLED;
return;
}
Ubuntu 18.04. Since users reported a patch in "Cosmic":
echo "deb-src <a href="http://us.archive.ubuntu.com/ubuntu/">http://us.archive.ubuntu.com/ubuntu/</a> cosmic main universe
multiverse" | sudo tee /etc/apt/sources.list.d/cosmic.list
sudo apt update
sudo apt build-dep libinput10
apt source libinput10
Edit affected files (catfish search all files for text K400):
libinput-1.10.6.orig/src/evdev-debounce.c
libinput-1.10.6.orig/src/evdev.c
libinput-1.10.6.orig/src/evdev.h
libinput-1.10.6.orig/udev/90-libinput-model-quirks.hwdb
Edit all files based using existing entries as guide.
Commit patch in source (required to build locally)
debuild -uc -us</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Logitech K400: double tap on touchpad is filtered by debouncing code"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105974">Bug 105974</a>] Logitech K400: double tap on touchpad is filtered by debouncing code
</li>
</ul>
</div>
<br>
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