I have an android tablet connected to a USB Keyboard that wakes up normally if i press any key, which leads me to think that this problem occurs only on Mi Box.

Does anybody knows if there is a fix for it? Maybe some app that fix it, or even a screensaver app that fakes a sleep state, making all the screen black and reducing cpu usage, because if i let my mi box always awake with the default screensaver from android, it gets warm in the same way as if i were using it...