[Bug 1696929] [NEW] X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Daniel van Vugt (vanvugt):

Some laptop touchpads are annoyingly unresponsive when the software
implements any kind of hysteresis. This includes Lenovo X1 Carbon gen 4
and 5. Such devices have lower precision and higher lag in the touchpad
hardware than you might expect, so need the software to not slow them
down further.

The problem now is that using libinput by default slows down all
touchpads and makes them less precise. For hardware that was already
unresponsive, introducing software that further reduces the
responsiveness is very frustrating, borderline unusable.

When we were using Xorg the simple solution was to adjust hysteresis
with 'synclient'. However now we're using Wayland we're stuck with
libinput and I don't know how to fix it any more. Even Xorg logins seem
to use libinput now, so there's no 'synclient' workaround available
there anymore either.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: libinput10 1.6.3-1ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
Uname: Linux 4.10.0-22-generic x86_64
ApportVersion: 2.20.5-0ubuntu4
Architecture: amd64
Date: Fri Jun  9 14:52:18 2017
InstallationDate: Installed on 2017-06-08 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170607)
SourcePackage: libinput
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: libinput
     Importance: Medium
         Status: Fix Released

** Affects: libinput (Ubuntu)
     Importance: High
         Status: Triaged


** Tags: amd64 apport-bug artful
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X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy
https://bugs.launchpad.net/bugs/1696929
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