After suspending, two finger scrolling stops working.
→ TITANIC@~ $ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 17.10
Release: 17.10
Codename: artful
→ TITANIC@~ $ uname -r
4.13.0-32-generic
I'm pretty sure this worked before, so this seems like a kernel regression.
As a workaround, I'm reloading the psmouse kernel module anytime I experience this.
sudo modprobe -r psmouse && sudo modprobe psmouse