The title says it all.
One chooses to put the shell in full-screen to maybe inspect a long log, scrolling through it. Continuous unrequested brightness changes which seem introduced by design (their happening is repeatable at the same points when scrolling up and down) are really annoying, and I can't find anything about this behaviour neither in settings/preferences nor googling around ... (a lot about how to set this brightness at system and at application level, but nothing about this behaviour).
How can I turn off this behaviour? I am also interested in understanding the reason behind this "feature".
But I might have seached ineffectively due to my bad english. So if anybody can direct me to the right link, that would be great!