I am trying to use a mouse and keyboard to control the Dragonboard.
The USB host ports on the Dragonboard 410c stop working after a few minutes. I have only reproduced it twice so I don't have numbers.
At first, the USB ports stopped working because I was powering the board from 3.5V instead of 7.0V. But now they occasionally stop working even with 7.0V power.
Solution: Power the board with the correct voltage.
By "stop working" I mean that there will be no power delivered to the mouse and the Dragonboard will not respond to it. BUT if I plug in the mouse half way such that the USB power pins are connected but not the data pins, I can see the red light of the mouse turn on. But when I plug it in fully then it turns off again.
Solution: Unplug the micro-USB cable (the ADB debug port) Only one of ADB or USB host can be active at once. Not both.