I just found a kind of hardware solution to this problem. There's a touchpad configuration flag named "absolute position filtering" which roughens the position reporting. Accessing that configuration is a bit tricky, but there's a code in fwupd project which demonstrates how it's done. I created a "proof of concept" script which changes the flag. https://raw.githubusercontent.com/KIrill-ka/x230-touchpad-scripts/master/x230-abs-filter-disable.tcl Run as root. It's rather safe, trust me :) Despite of the name, the script works on x220. The hardware is the same. The configuration stays there until the next reboot (or suspend). It should be possible to store the configuration permanently in the touchpad's flash. But it requires more work.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/1042069 Title: Jumpy Mouse Cursor using Thinkpad X230 Touchpad Status in xserver-xorg-input-synaptics package in Ubuntu: Confirmed Bug description: Really annoying bug! Trackpoint moves the mouse cursor smootly, when using the touchpad i have a jumpy cursor. (vertically it moves fine, horizontally it moves always 4 pixels at once). Please see the following demonstration video: http://www.youtube.com/watch?v=XUVRKFUsAmc ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: xserver-xorg-input-synaptics 1.6.2-1ubuntu4 ProcVersionSignature: Ubuntu 3.5.0-11.11-generic 3.5.2 Uname: Linux 3.5.0-11-generic x86_64 ApportVersion: 2.5.1-0ubuntu2 Architecture: amd64 Date: Mon Aug 27 08:08:27 2012 InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120824) ProcEnviron: LANGUAGE= TERM=xterm PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: xserver-xorg-input-synaptics UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1042069/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
