Hi,

As previous comments about adding a USB power switch for current VBUS
controls on two USB hosts(for J16 and J20)

A schematic proposed is recorded on:
http://en.qi-hardware.com/wiki/Milkymist_One_RC3_Known_Issues#add_USB_Power_Switch

A show of this patch:
http://en.qi-hardware.com/wiki/Milkymist_One_run_3_schedule#USB_Power_Switch_Circuit

A quick rough result of tests in success on both usb mouser and keyboard
work well while run 10 times power-cycle and clicked 'reboot' in gui.

-- 
adam
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