Comment 2 for bug 160347

read the /dev/input/eventX directly, we can find that when a key pressed, three key press event will be send out, and interval time of the first two press is about 0.2 seconds and the last two press is about 53 u seconds.
when read the /dev/input/eventX at normal state, we can find that only key press and key up event can be report from /dev/input/eventX.
So we can know that the issue comes from usbhid driver or USB driver. And have nothing to do with the graphics driver and upper application such as GUI.