Thinkpad touchpad mouse cursor laggy/choppy | Ubuntu 18.04

see my answer here:

I can confirm a similar issue with my touchpad on HP ProBook 450 G6 with Ubuntu 18.04, it was very laggy after suspend.

What worked for me: create /lib/systemd/system-sleep/touchpad:

#!/bin/sh

case $1 in
  post)
    /sbin/rmmod i2c_hid && /sbin/modprobe i2c_hid 
  ;;
esac

make file executable chmod +x /lib/systemd/system-sleep/touchpad and test (suspend computer and wake-up again)

I had this (or a similar) problem with a thinkpad 470. The mouse pointer was suddenly choppy after a reboot. Rebooting did not help.

The problem finally went away after I sent it to sleep and woke it up again. (sudo systemctl suspend)

I have same problem on my Thinkpad T460s with Ubuntu 18.04 (Ubuntu 16.04 and Windows 10 have no problem). I tried the solution here and after reboot, the problem was solved.

sudo apt install xserver-xorg-input-synaptics-hwe-18.04