Also on ThinkPad X1 Carbon 5th
Linux x1-cosmic 4.18.0-10-generic #11-Ubuntu SMP Thu Oct 11 15:13:55 UTC 2018 
x86_64 x86_64 x86_64 GNU/Linux

Synaptics touchpad
xinput
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad                id=11   [slave  pointer  (2)]
⎜   ↳ TPPS/2 ALPS TrackPoint                    id=12   [slave  pointer  (2)]

Two finger scroll reproducibly stops working after suspend.

workaround of editing /etc/defaults/grub line to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash psmouse.synaptics_intertouch=0"

does work.

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https://bugs.launchpad.net/bugs/1722478

Title:
  Two-finger scrolling no longer works after resuming from suspend

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