I have a new Dell XPS 13 7390, with Ubuntu 18.04 (pre-installed by Dell).
Sometimes the touchpad stops working, and becomes completely unresponsive. So I cannot move the mouse pointer or click, but the laptop is responsive to the keyboard. This seems to happen randomly, but never when the laptop is plugged (so only on battery). Moreover, sometimes the touchpad starts working again after a few minutes, while other times I am forced to reboot the laptop.
Has anyone experienced a similar issue or know a fix?