Multiple Monitor - Main Screen Unaffected by Slider

[MYRWYR]

Great app! I've been able to use it to dim down my second monitor so the difference in brightness is not as apparent.

My primary screen's slider, however, does not make a visible change to that monitor, regardless of whether I turn the brightness up or down.

[JeanneD4RK]

Are your screen the same models ? make ? Are they plugged using the same standard ?
Maybe it's not supported by the screen or it might be plugged using a standard that does not support brightness value. HDMI and DisplayPort work fine on my screens.

[Pots4342]

had the same issue, but that was because the monitor was set in sRGB mode, which locked the brightness function