Comment 38 for bug 1651635

@adeptg: I ran the two first commmands:
 rmmod i2c_designware_platform
 rmmod i2c_designware_core
just to see the effect, without a touchpad failure.

The result: the touchpad stopped activity altogether.

Then I ran the last two commands:
 modprobe i2c_designware_core
 modprobe i2c_designware_platform

This caused the touchpad to resume. But the activity was jumpy and not reliable:
- one finger movement caused scrolling instead of pointer motion.
- then the pointer got stuck (it is stuck now as I write and I had to connect a mouse).

To summarize: the sequence of commands made the touchpad go from ok to broken.