MBP How to Disable Brightness Changing on EXTERNAL Monitor?

[awfulgrace]

I often play movies on an external Sony LCD via a Displayport-to-HDMI adapter. For the laptop display I have automatic brightness changing turned off, however in the setting for the Sony TV there is no checkbox.

When watching a movie, the brightness shifts all over the place when a dark scene comes on. I've even tried wrapping the entire laptop up in a dark sheet (to block the light sensor) and it helps a bit but I'm worried about heat and it's a pretty ghetto (and not even 100% effective) solution.

So my questions:

1. Is there a way to disable auto brightness changing for external displays?
2. Is it possible the TV is the one changing brightness? Don't think so because it doesn't otherwise do it.

 

[R3alsp33dy0ne]

Sounds like Dynamic Contrast on the TV. A lot of LCD TV's (including my Samsung) have individual display settings per input. Meaning if you turned off dynamic contrast for HDMI-1 it will still be enabled when you switch to HDMI-2 etc.

 

[awfulgrace]

Sounds like Dynamic Contrast on the TV. A lot of LCD TV's (including my Samsung) have individual display settings per input. Meaning if you turned off dynamic contrast for HDMI-1 it will still be enabled when you switch to HDMI-2 etc.

PERFECT! This is what it was -> "Advanced Contrast Enhancer" was set to Medium. I turned it off. Thanks!

 

[R3alsp33dy0ne]

No probs. Glad you got it sorted.

 

[torrentprime]

Sounds like Dynamic Contrast on the TV. A lot of LCD TV's (including my Samsung) have individual display settings per input. Meaning if you turned off dynamic contrast for HDMI-1 it will still be enabled when you switch to HDMI-2 etc.

A year or so later...
Google led me here, and this thread fixed my problem.

Thanks dude!

 

[enrvuk]

About 9 years later, on an LG. Also solved my problem. Smart Energy Saving in my case.