** Changed in: libinput (Ubuntu)
Status: Incomplete => New
** Description changed:
+ https://gitlab.freedesktop.org/libinput/libinput/issues/199
+
+ ---
+
When using the touchpad, the mouse cursor moves even when keeping the
finger still on one point.
Triggering the behaviour: this happens when the contact surface is very
small, so it gets triggered for example when tapping on a button, right
before the finger leaves the touchpad. This makes clicking buttons using
the touchpad (for example, the "x" button in the browser tabs) very
difficult.
In attachment, an evemu-record done keeping the finger on one point,
barely touching the touchpad.
The recording was done with the command:
sudo evemu-record > touchpad.evemu
Available devices:
/dev/input/event0: Power Button
/dev/input/event1: Lid Switch
/dev/input/event2: Power Button
/dev/input/event3: AT Translated Set 2 keyboard
/dev/input/event4: Video Bus
/dev/input/event8: SynPS/2 Synaptics TouchPad
/dev/input/event9: Dell WMI hotkeys
/dev/input/event10: HDA Intel PCH Mic
/dev/input/event11: HDA Intel PCH Front Headphone
/dev/input/event12: HDA Intel PCH HDMI/DP,pcm=3
/dev/input/event13: Laptop_Integrated_Webcam_HD: In
Select the device event number [0-13]: 8
To replay the recording (the strange behaviour is particularly visible
in the final part):
sudo evemu-play /dev/input/event8 < touchpad.evemu
(replace event8 with your input device)
System info:
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
apt-cache policy libinput10
libinput10:
Installato: 1.10.4-1
Candidato: 1.10.4-1
Tabella versione:
*** 1.10.4-1 500
500 http://it.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status
apt-cache policy libinput-bin
libinput-bin:
Installato: 1.10.4-1
Candidato: 1.10.4-1
Tabella versione:
*** 1.10.4-1 500
500 http://it.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1808881
Title:
Unwanted touchpad movements on tap with Synaptics touchpad on DELL
Inspiron-3521
To manage notifications about this bug go to:
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