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Michael
Asked: 2018-08-16 20:27:32 +0800 CST

touchpad turning circles into squares

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I've got a Lenovo T450s that I'm running LUbuntu 18.04 on. I've got the Synaptics driver and am using Touchpad-Indicator for touchpad control.

I have noticed that the touchpad seems very jerky at times, and when I experimented with it I discovered it is only jerky when I am trying to make arcing or circular motions, for instance when trying to make the motion of signing my name.

In the image below, I watched the touchpad to make my finger move in as close to a circle as possible:

enter image description here

As you can see, instead of being a circle, the cursor wanted to move in straight lines and only change directions at certain intervals.

I tried again, this time to draw a quick circle:

enter image description here

Instead of a circle it is looking more and more like a square with rounded corners!

I tried disabling natural scrolling and circular scrolling under Touchpad Indicator -> Preferences -> Touchpad configuration, but it made no difference.

How can I make the touchpad behave properly? It's practically useless like this!

lubuntu touchpad synaptics

1 Answers

  1. My solution was finally to run:

    $ synclient HorizHysteresis=0
$ synclient VertHysteresis=0

    Now my touchpad can move the cursor diagonally and in tight circles (Xubuntu, HP Elitebook).

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