Try this:
1. Edit /etc/gdm3/custom.conf as root/with sudo
2. Uncomment the line WaylandEnable=false so it looks like below:
[daemon]
# Uncoment the line below to force the login screen to use Xorg
WaylandEnable=false
3. Reboot and see if the issue still occurs.

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https://bugs.launchpad.net/bugs/1791427

Title:
  Touchpad and/or trackpoint stop working after S3 suspend on Lenovo X1
  Carbon 6th

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