>From what I read on this topic. this could well be Asus hardware problem.
Display and mainboard are fed from a single PSU. And when this PSU is on 
batteries, and the mainboard is taking peak current for its CPU, display LED 
highlight is getting underpowered and it is going black.
I have at least two Asus X302 modifications at hand (X302LA and X302UV), 
showing exactly this behavior under either Linux (Ubuntu 18.04) or Windows 10 
(1803). So I would suppose this is not easily fixable with software. When 
there'll be time to replace these laptops, I surely will try to ask repairmen 
about fixing their backlights. But so far, they are our daily-used 'production' 
systems.

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https://bugs.launchpad.net/bugs/1613070

Title:
  i7-6500U screen flickering and blinking

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