I have the same problem on Lenovo Thinkpad Edge 530 and Ubuntu 13.04
The settings from comment #5 did not satisfy me since the cursor speed is
pretty much affected (reduced) and increasing the VelocityScale returns back
the problem.
After reading the Synaptics manpage I experimented a better configuration, that
doesn't affect the speed: there is a
nice feature called NoiseCancellation.
I have created the following config file in
/usr/share/X11/xorg.conf.d/50-thinkpad-touchpad.conf:
Section "InputClass"
Identifier "touchpad"
MatchProduct "SynPS/2 Synaptics TouchPad"
Driver "synaptics"
# fix touchpad resolution
Option "VertResolution" "100"
Option "HorizResolution" "65"
# increment noise cancellation factor
Option "HorizHysteresis" "50"
Option "VertHysteresis" "50"
EndSection
You can increase the Horiz-/VertHysteresis even more if you experience
still some jumping.
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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 (+X230t) 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)
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https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1042069/+subscriptions
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