** Summary changed:
- X1 Carbon gen4 and gen5 touchpads are unresponsive and laggy
+ Touchpads are unresponsive and laggy
** Changed in: libinput (Ubuntu)
Status: Incomplete => Confirmed
** No longer affects: gnome-shell (Ubuntu)
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https://bugs.launchpad.net/bugs/1696929
Title:
Touchpads are unresponsive and laggy
Status in libinput:
Confirmed
Status in libinput package in Ubuntu:
Confirmed
Bug description:
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)
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