The brightness changes with the colors displayed on the screen on my Lenovo Thinkpads with Intel HD Graphics. Light colors make the screen brighter, dark make it darker. Same behavior in Windows 8.1 and 10.
The "adaptive brightness" feature in Windows is disabled.
Just found a suggestion that solved my problem here.
It is the Intel "Display Power Saving Technology" that is to blame.
Disable it like so:
Even after changing the "power" options in the "Intel HD graphics control panel" the brightness kept adapting to the image brightness/darkness.
So did some research and found a solution through editing the registry.
instructions:
regedit and press EnterHKEY_LOCAL_MACHINE\Software\Intel\Display\igfxcui\profiles\media\Brighten Movie and change ProcAmpBrightness to 0HKEY_LOCAL_MACHINE\Software\Intel\Display\igfxcui\profiles\media\Darken Movie and change ProcAmpBrightness to 0This should solve the problem.
So i just fixed this problem temporarily. What i did is i went to Device Manager, then went to Display adapters.
Now i have 2 graphics cards in my system, one is an integrated Intel HD4000 and the second is a Geforce GT740M so i dont know if this will work on systems with 1 graphics card.
After this just disable and enable your integrated graphics card and it should fix it.
I've looked around the web and there appear to be several possible causes and solutions to this problem depending on your Windows version and hardware. Here's a compilation of how to turn off adaptive brightness.
In regedit:
Go to HKEY_LOCAL_MACHINE\Software\Intel\Display\igfxcui\profiles\media\Brighten Movie and change ProcAmpBrightness to 0
Go to HKEY_LOCAL_MACHINE\Software\Intel\Display\igfxcui\profiles\media\Darken Movie and change ProcAmpBrightness to 0
I tried so many of these fixes and nothing worked. I was finally able to beat this problem though. I have an i7 processor with integrated HD graphics but also have an nVidia card as well. During Windows 10 setup (or maybe before) my integrated HD card was disabled in my BIOS. I had to enable the integrated HD graphics and then in Windows install the newest HD graphic drivers. After the drivers installed all my tweaking around in the power options screen actually did something. Your mileage may vary but I think enabling the disabled integrated video chip in the BIOS and installing the proper drivers is what was missing. At least for me.
Everything here didn't help and in the end the problem was in the monitor itself - it is a mag monitor went into the monitor's settings (the physical menu button on monitor) and go into color and change DCR mode to off
I had the same problem and also tried all of those fixes and nothing worked till now. I use a secondary monitor for my laptop and was able to fix the problem when I disconnected the secondary monitor, restarted the power plan from the advance power setting ("restore plan defaults"), then restarting my laptop and after that changing the adaptive brightness to off. It works just fine now.
This happened to me also. I tried all of the other solutions but none worked. Then I noticed that my desktop background was not my usual.
I right-clicked on the desktop, chose "Personalize" and in the Background slot, I chose "Picture" and clicked on the picture I wanted. The problem went away.
