monitor dims when watching movie

[Cream Soda]

How do i stop this

[Dmitry]

When you say dim, is it just not as bright lighting-wise, or does it go in to power save?
What kind of monitor is it?
Are you watching full screen?

[Cream Soda]

power save, yes full screen and its hanspree (also dims non pc stuff but pc only dims fullscreen)

[TheMysteriousX]

I would bet a small amount of money on your monitor having some sort of adaptive brightness control.

Have a read through the manual and on screen display, see if there is an option called "adaptive display", "adaptive power saving", "automatic brightness adjustment" or similar and if it is on, disable it.

[Cream Soda]

I don't have the manual handy (it's in my grandparents room and they're asleep 6am ect), but just w/ the menu that's actually on the monitor itself, I don't see any sort of options that meet the description.

Brightness/Contrast
Brightness
Contrast
X-contrast (I'm using this)

INPUT SETTING
Input setting HDMI2
Auto Search On

Color setting
Nature

IMAGE SETTING
Aspect Ratio FULL
H-Position 50
V-Position 50
Clock 50
Phase 0
Sharpness 2

OSD SETTING
Language English
H-position 50
V-Position 50
Transparency 0%
OSD Time-out 10 sec
OSD Color mode 2

SYSTEM
AUdio input HDMI
Volume 50
Mute Off
DDC/CI ON
Factory Reset OFF
Information

With X-Contrast on, brightness and contrast are both grayed out, can't adjust them.

Not sure if it has to do w/ x-contrast, but H-position, V-position, clock, and phase are also grayed out

[Cream Soda]

kk, X-contrast only effects brightness/contrast, didn't remove gray from the other stuff