No options to turn OFF adaptive brightness / no power slider

Hello everyone!

I'm stuck with a very weird problem I can't solve. I'm not a full-on reading binary style tech person but I'm using computers (and fix their problems) since forever and never ran against a wall like this:

My Dell M3800 laptop turned on the adaptive brightness feature again that I disabled almost three years ago. Now it's pretty much useless in dim environments because the screen gets so dark. Also every option windows normally has to switch it off is gone. Not greyed out, it's just not there (Both in the legacy power options and in te new UI).

Around the same time it happend that windows decided to get rid of the old power profiles and instead only show the "balanced" one that comes with the power options slider when you click on the battery icon in the tray. I had that briefly and then the slider disappeard along with the option of turning adaptive brightness OFF.

This makes me MAD.

• I deleted and restored the default power plans in several ways
• I changed all (all I found, though) corresponding registry entries to disable adaptive brightness
• I checked the registry for the the option to show the switching-option being ENABLED
• I even stopped the windows service for the ambient light sensor

No change. Any Wizards around?

Daniel

Exactly the same as yours!

How could I have missed that?!

Option TWO actually worked for me!

THANKS A LOT!

Although I'm really puzzled that this is supposed to be like that now? I mean... What are they thinking?
Anyhow... It's a stupid workaround but at least I can use the laptop again!

This is only temporary as at some future Bootup that overrides the Intel Profile you have set, and you can get it changing to 50% on starting, and/or the adaptive varying brightness with content starts up again.
This is particularly bad in version 1809.

I don't know a permanent answer, everything seems to be just a temporary fix for the two dimming scenarios.