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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - kernel: touchpad jump (libinput 1.9.3) Lenovo R61"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104812">104812</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>kernel: touchpad jump (libinput 1.9.3) Lenovo R61
</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>davefreitag@hotmail.com
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=136989" name="attach_136989" title="evemu-record capture of the event">attachment 136989</a> <a href="attachment.cgi?id=136989&action=edit" title="evemu-record capture of the event">[details]</a></span>
evemu-record capture of the event
I've noticed this message in my journal logs. Seems to occur intermittently
when I'm doing a two-finger scroll on my touch pad.
Journal messages:
Jan 27 12:25:25 localhost.localdomain org.gnome.Shell.desktop[1441]: libinput
error: event4 - libinput error: SynPS/2 Synaptics TouchPad: libinput error:
kernel bug: Touch jump detected and discarded.
Jan 27 12:25:25 localhost.localdomain org.gnome.Shell.desktop[1441]: See
<a href="https://wayland.freedesktop.org/libinput/doc/1.9.3/touchpad_jumping_cursor.html">https://wayland.freedesktop.org/libinput/doc/1.9.3/touchpad_jumping_cursor.html</a>
for details
Followed the instructions at the site to gather info. (Hope I didn't miss
anything)
Machine - Lenovo R61
Touch pad measures 56mm wide x 38mm tall
OS - Fedora 27
# rpm -qa | grep libinput
xorg-x11-drv-libinput-0.26.0-1.fc27.x86_64
libinput-1.9.3-2.fc27.x86_64
# uname -a
Linux localhost.localdomain 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan 19 13:19:54
UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ xwayland-pointer:13 id=6 [slave pointer (2)]
⎜ ↳ xwayland-relative-pointer:13 id=7 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ xwayland-keyboard:13 id=8 [slave keyboard (3)]
$ xinput list-props 2
Device 'Virtual core pointer':
Device Enabled (117): 1
Coordinate Transformation Matrix (119): 1.000000, 0.000000, 0.000000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
$ xinput list-props 4
Device 'Virtual core XTEST pointer':
Device Enabled (117): 1
Coordinate Transformation Matrix (119): 1.000000, 0.000000, 0.000000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
XTEST Device (236): 1
$ xinput list-props 6
Device 'xwayland-pointer:13':
Device Enabled (117): 1
Coordinate Transformation Matrix (119): 1.000000, 0.000000, 0.000000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (242): 0
Device Accel Constant Deceleration (243): 1.000000
Device Accel Adaptive Deceleration (244): 1.000000
Device Accel Velocity Scaling (245): 10.000000
$ xinput list-props 7
Device 'xwayland-relative-pointer:13':
Device Enabled (117): 1
Coordinate Transformation Matrix (119): 1.000000, 0.000000, 0.000000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (242): 0
Device Accel Constant Deceleration (243): 1.000000
Device Accel Adaptive Deceleration (244): 1.000000
Device Accel Velocity Scaling (245): 10.000000
# cat /sys/class/dmi/id/modalias
dmi:bvnLENOVO:bvr7LET39WW(1.09):bd05/14/2007:svnLENOVO:pn77331CU:pvrThinkPadR61:rvnLENOVO:rn77331CU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
# udevadm info /sys/class/input/event4
P: /devices/platform/i8042/serio1/input/input5/event4
N: input/event4
E: DEVNAME=/dev/input/event4
E: DEVPATH=/devices/platform/i8042/serio1/input/input5/event4
E: ID_BUS=i8042
E: ID_INPUT=1
E: ID_INPUT_HEIGHT_MM=24
E: ID_INPUT_TOUCHPAD=1
E: ID_INPUT_TOUCHPAD_INTEGRATION=internal
E: ID_INPUT_WIDTH_MM=43
E: LIBINPUT_DEVICE_GROUP=11/2/7:isa0060/serio1
E: LIBINPUT_MODEL_SYNAPTICS_SERIAL_TOUCHPAD=1
E: MAJOR=13
E: MINOR=68
E: SUBSYSTEM=input
E: USEC_INITIALIZED=13296045
Attached evemu-record recording (scroll.evemu). Verified that it recreates with
evemu-play /dev/input/event4 < scroll.evemu .</pre>
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