If you ever experience an issue where the touchpad becomes hypersensitive (motion) and multitouch gestures fail after resuming from suspend – happens to me occasionally – do this
sudo rmmod hid_multitouch
sudo modprobe hid_multitouch
I don’t have any clue why this kind of thing would happen, but just leaving the workaround here in case someone Googles for it!
I’m running Ubuntu 21.10 with Cinnamon.