https://bugs.freedesktop.org/show_bug.cgi?id=106534
Bug ID: 106534
Summary: Logitech K400: double tap on touchpad is filtered by
debouncing code
Product: Wayland
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: libinput
Assignee: wayland-bugs@lists.freedesktop.org
Reporter: noab...@yahoo.com
CC: 1762...@trash-mail.com, peter.hutte...@who-t.net,
wayland-bugs@lists.freedesktop.org
Depends on: 105974
Created attachment 139584
--> https://bugs.freedesktop.org/attachment.cgi?id=139584&action=edit
Patch for source package in Cosmic 1.10.6
+++ This bug was initially created as a clone of Bug #105974 +++
+++ Which is an extension of bug 104415 +++
this is a copy of:
https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1762536
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 http://us.archive.ubuntu.com/ubuntu/ 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
Referenced Bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=105974
[Bug 105974] Logitech K400: double tap on touchpad is filtered by debouncing
code
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