[Dev] usb connection problems

I've been having no luck getting low-speed USB devices (i.e.: keyboard and mouse) to work with the 4.4 96boards kernel on hikey. My ethernet dongle works fine though. Is there a known problem or do I maybe just have a config issue? The error messages are:

device descriptor read/64, error -71

and

device not accepting address 7, error -71

Thanks, -dl