I installed a new power outlet in my desk (this one). When I charge my Fairphone 2 from one of its USB ports, the touchscreen becomes totally unresponsive. When I unplug, and turn the screen off-and-on-again, touches are recognized again.
When I charge from my laptop, or a different power socket with usb adapter, I do not experience the same problem.
This may or may not have something to do with the recent update to 1.4.2. I don’t remember if I ever tried to charge the phone through the new outlet before the update.
What could be causing this? The USB ports on the new outlet are specified as 1000mA 5V. Are those the wrong specs?