Please help for the love of god: Windows 10 HDR dimming and brightening again in game
By - Mediocre-Equivalent5
HDR makes everything darker so that whites can be more powerful. (No racism intended) it actively shifts how dark it makes stuff to make white light pop more.
But usually this is unnoticeable, Win 10 however likes to swap between HDR and SDR depending on what's going on in the background like apps running, its never been fixed. And it's only a problem for some screens.
Oh man the begining of that comment caught me off guard
Checked your tv’s settings for adaptive brightness? Each brand might have a marketing name for it but pretty sure Samsung just calls it auto brightness.
My hunch is TV’s dynamic tone-mapping is causing this.