Windows 10: windows 11 cannot adjust monitor brightness. Drivers are up to date. External monitor...

windows 11 cannot adjust monitor brightness. Drivers are up to date. External monitor does not have adjustments. Brightness slide is there but cannot choose it grayed out.

:)

 

Can't adjust brightness on external monitor

I have a Surface Book with a LED Cinema Display connected. Everything works fine except that Windows does not let me control the brightness of the external monitor. If I use "Extend these displays", the "Adjust brightness level" is greyed out. If I show
only on the external monitor, the brightness slider becomes available but has no effect.

In Device Manager there are two display adapters: "Intel HD Graphics 520" and "NVIDIA GeForce GPU". I presume the first one is for the internal Surface display and the second one for the Cinema Display.

Under monitors in Device Manager there are two: Generic PnP Monitor and Surface Display.

"Generic monitor" doesn't sound very convincing to me. Should it not be more specific for the Cinema Display?

 

HDMI external monitor: adjust brightness according to profile/day time

Hello,
OS: win10 Familly

I use an external hdmi monitor on a notebook, in that case I only use the external monitor (viz no dual display).

I can adjust the brightness of:
* the notebook screen with the "Sun up" and "Sun down" key on the keyboard.
* the external monitor with the menu on the monitor, but modifying on the monitor is cumbersome: need to call the menu, then "Picture", than "Brightness", then OK, then adjust with + and -, then finally confirm.


As the day light vary, from a bright sunny to dark, I noticed it's very relaxing to adjust the brightness between 100% (sunny) to 40% (dark).
How is it possible to "easily" adjust the external monitor brightness?

1/ The "Sun" up and down key only functions for the notebook, not for the external monitor - it's quick & easy.
Is it possible to apply to the external monitor?

2/ There are browser add-ons for that, but then it's bound to the browser, not all other apps.

Ideally, I would like to create 3 profiles of brightness or have some simple + and - keyboard shortcuts to adjust the hdmi brightness.

Thanks

REF:
Adjust Screen Brightness in Windows 10 Windows 10 General Tips Tutorials

 

How to adjust brightness on external monitor, IN OPERATING SYSTEM.

Is there a way to change the brightness on an external monitor hooked up to my Surface? The brightness slider under display settings is grayed out. (Windows 10)

I can adjust the brightness through the buttons on the monitor itself but it's a terrible interface. This is something I need to do daily as the sun sets so I'd much rather be able to hit some hot keys.

Monitor is an Acer.