Ubuntu
xserver-xorg-input-synaptics package

  1. Bug #1042069
  2. Comment #14

Comment 14 for bug 1042069

Revision history for this message
Brain (brain) wrote : Re: Jumpy Mouse Cursor using Thinkpad X230 (+X230t) Touchpad

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.