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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https://bugs.launchpad.net/bugs/1042069
Title:
Jumpy Mouse Cursor using Thinkpad X230 (+X230t) Touchpad
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