** Description changed: 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. + implements any kind of hysteresis. This is a regression caused by the + introduction of libinput, visible on at least Lenovo X1 Carbon gen 4 and + 5, Dell XPS 13, and Apple Macbook Air. - 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. + WORKAROUND (1) - 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. + 1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg. + 2. sudo apt install xserver-xorg-input-synaptics + 3. Tweak your personal preferences using 'synclient' (the GUI settings won't work any more). + + WORKAROUND (2) + + 1. Download and install the exact version 1.9.4-1 of libinput: https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729 + That version contained the fix for this bug, briefly. 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)
** Description changed: Some laptop touchpads are annoyingly unresponsive when the software implements any kind of hysteresis. This is a regression caused by the introduction of libinput, visible on at least Lenovo X1 Carbon gen 4 and 5, Dell XPS 13, and Apple Macbook Air. WORKAROUND (1) 1. Log into "Ubuntu on Xorg" only. This workaround only works for Xorg. 2. sudo apt install xserver-xorg-input-synaptics 3. Tweak your personal preferences using 'synclient' (the GUI settings won't work any more). WORKAROUND (2) - 1. Download and install the exact version 1.9.4-1 of libinput: https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729 + 1. Downgrade to version 1.9.4-1 of libinput: https://launchpad.net/ubuntu/+source/libinput/1.9.4-1/+build/13855729 That version contained the fix for this bug, briefly. 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) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libinput in Ubuntu. https://bugs.launchpad.net/bugs/1696929 Title: Touchpads are unresponsive and laggy To manage notifications about this bug go to: https://bugs.launchpad.net/libinput/+bug/1696929/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
