I've used a Thinkpad Edge E220S before, and I don't believe the problem
mentioned in comment #14 is the same. It's the direct opposite,
actually.
The Edges have hyper-sensitive touchpads that move the cursor even when
your finger is stationary. Increasing the V/H-Hysteresis stabilizes the
pointer and makes the touchpad really nice to use. Conversely, the X230
has a touchpad that feels like it has really low sensitivity -- shift
your finger a bit, and the pointer doesn't budge, but move your finger a
bit more, and the pointer jumps a couple of pixels.
The configuration in comment #5 appears to make the cursor less jumpy,
though still visibly jerky, but causes the pointer to move overly slow.
Additionally, something feels a bit off when moving diagonally, so I've
commented out the Vert/Horiz-Resolution lines. With some further
tweaking of the values, this is what I have come up with:
Section "InputClass"
Identifier "touchpad"
MatchProduct "SynPS/2 Synaptics TouchPad"
MatchTag "lenovo_x230_all"
Driver "synaptics"
# fix touchpad resolution
# Option "VertResolution" "100"
# Option "HorizResolution" "65"
# disable synaptics driver pointer acceleration
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
You'll need to either add the udev rule from comment #13 or comment out
the MatchTag line to get this to work.
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https://bugs.launchpad.net/bugs/1042069
Title:
Jumpy Mouse Cursor using Thinkpad X230 (+X230t) Touchpad
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