Comment 5 for bug 1765832

I'm running into this issue too

The solution detailed here doesn't solve my issue --> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1722478/comments/72

I'm running Ubuntu 18.04 on a Thinkpad P52s.
This solution works for me (I just have to run it every time I get back to my computer from a suspended state):

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1722478/comments/24

      $ sudo modprobe -r psmouse
      $ sudo modprobe psmouse