Occationally Elitebook screen brightness is automatically set as zero

[asokero]

Sometimes (could be after resuming from suspend) the screen of Elitebook laptops (at least G5, G6 & G7) is black. This is due to brightness ending automatically as at zero value. This causes confusion if the laptop is broken on software is crashed, although the problem can be solved by increasing the screen brightness via keyboard.

How to reproduce this is still unknown.