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fixing the trackpoint on ubuntu

by Jörg Baach last modified Aug 26, 2013 11:29 AM
The trackpoint acts jumpy (again). How can I fix it?

Combining advice from

 

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1042069

and

http://www.x.org/wiki/Development/Documentation/PointerAcceleration/

 

had me create the following file in /usr/share/X11/xorg.conf.d/50-thinkpad-touchpad.conf:

Section "InputClass"
Identifier "touchpad"
MatchProduct "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device|Composite TouchPad / TrackPoint"
Option "MinSpeed" "1"
Option "MaxSpeed" "1"
# tweak the X-server pointer acceleration
Option "AccelerationProfile" "2"
Option "AdaptiveDeceleration" "1000"
Option "ConstantDeceleration" "16"
Option "VelocityScale" "30"
Option "AccelerationNumerator" "30"
Option "AccelerationDenominator" "10"
Option "AccelerationThreshold" "10"
EndSection

Section "InputClass"
Identifier "touchpad"
MatchProduct "Synaptics Inc. Composite TouchPad / TrackPoint (Stick)"
Driver "evdev"
Option "AccelerationProfile" "6"
Option "ConstantDeceleration" "12"
Option "VelocityScale" "30"
EndSection
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