Unable to set brightness level for Plugged in and on battery

I second this.

Please Microsoft, reinstate a static brightness slider for when on battery and when on AC power.

Sure, we can manually slide the brightness slider whenever we want to, but why not set it so that:

1. When the laptop is running on battery power, the screen brightness is automatically set to, say, 60%
2. When the laptop is running on AC power, the screen brightness is automatically set to, say, 100%.

Here's the thing: if I could, I'd have the screen on 100% all the time, and when my laptop is plugged in, that's not a problem. However, most of us like to save battery power by reducing the brightness of the screen when we unplug from the mains. Having two presets would really help in this matter.

The setting once existed but now doesn't. Please make it exist again!

Thank you.

I am afraid that the matter may be somehow misunderstood. I have  the same problem on three different laptops, starting from a recent Windows update, probably 1903. The issue does not refer to malfunctioning of a driver, it is a separate setup of the brightness level for battery operations which has been recently deleted in Windows.

In details: it was  possible to easily setup a different brightness level of the display when the laptop was on battery (eg. 80%) and when plugged in (e.g. 90%), for example just through the brightness slider in the  Action Center. Once the laptop was on battery,  reducing the brightness level to (e.g). 80% in the slider of the Action Center, this was remembered by Windows, so that each time the laptop was unplugged the display brightness was automatically dimming the brightness level (in my example to 80%) . Now the user has to re-set the brightness level manually each time the laptop goes on battery, if the user wants to dim the brightness level when on battery.

The problem is that there is no longer a dedicated set up of the display brightness for battery operations, and the specific setups still present in BIOS are overridden by Windows as soon as the brightness level is changed.

Reinstating the old feature will  improve the battery runtime of laptops.

Honestly Microsoft - why on earth would you remove this?  Having a different default brightness when on battery vs. plugged in ALWAYS WORKED BEFORE THIS.  It is one of the most useful features on a laptop since battery life goes up dramatically when the brightness is dimmed.  To have to do this manually now every time I plug or unplug since on Windows 1909 is a huge step backward.

And the battery saver version of this is a joke - I don't want to run everything in battery saver mode - just turn the brightness down so that I have 7 hours of battery instead of 2, and not 1.5 hours of battery until battery saver threshold and then an extra hour on battery saver.  Does anyone at Microsoft actually use a laptop?  Again, this has worked for many many years before this.

What's funny is the standard responses of "Update Drivers", restore this or that - when this is clearly a feature that has been removed from Windows regardless of drivers.  Whatever is happening where all driver manufacturers have to change to UWP apps for touchpads, trackpoints, graphics driver control panels etc has been a royal pain in the butt.  Pretty much all settings for any of these have now been watered down to become practically useless for power users.  If I wanted and OS that forced me to do things only one way I would be using a Mac (I have to use one for some dev and I detest it).  Stop watering down Windows please.

I third it.

Right now there's a "Lower screen brightness while in battery saver" which does what is being discussed, but only when the battery hits the level set for battery saver mode. If the separate brightness level for plugged in vs battery cannot be had then it would be desirable to have this setting label drop the "saver" part and just be "Lower screen brightness while on battery" or something to that effect.

I fourth it!!!

I don't know how many comments it took to get it disabled so I hope we can get enough to change it back.