Windows 10: DDC/CI controls display brightness and other functions

Hello: I am a display developer, I need microsoft system through the DDC/CI protocol to send custom instructions to the display device to achieve functional control of the display. So I need the corresponding API or SDK to allow me to successfully complete the development. The problem encountered at present: the computer client is not compatible enough with different brands of graphics cards, and the instructions cannot be sent to the monitor through HDMI or DisplayPort. Or some public interface that allows me to solve such a problem ?

:)

 

DDC/CI and brightness keys

Thanks for the reply, but your answer is not clear.

I understand that the graphics card is ultimately responsible for sending the required signal.

But the Dell Display Monitor software already allows software driven control of the screen brightness (via an onscreen slider), suggesting that the graphics card is already behaving as expected. The user manual of the graphics card offers no further advice
about setup of this function.

My question is really more about the Microsoft Modern Keyboard. The support page you linked to gives no information about the specific functioning of the media, volume and brightness keys on the Modern Keyboard.

With a fresh install of Windows 10 Pro 64-bit, a 2017 DDC/CI compatible monitor, and latest generation graphics card, I would have expected this Modern Keyboard function to "just work."

But since that is not the case, I would be very grateful if someone could suggest a way to get these elements working together as expected.

Thanks!

 

DDC/CI and brightness keys

I have a Dell monitor supporting DDC/CI, a Intel-based PC running Windows 10 Pro 64-bit with an Nvidia GTX 1080 Ti, and a new Microsoft Modern Keyboard with Fingerprint ID.

The Modern Keyboard has brightness keys (top middle, also F7/F8 if you hold down "fn"), and the monitor can accept brightness changes via DDC/CI (works with the Dell Display Manager software). When I touch the brightness keys, I get a small overlay in the screen
top left of the brightness "changing" (is this a Windows overlay), but the actual display brightness does not change.

Is there a way to get the brightness keys working to change the monitor brightness?

Whose technology is responsible for this? Nvidia? Microsoft? Dell?

 

DDC/CI and brightness keys

Hi,

You concern about adjusting the display brightness using the keyboard keys is controlled by the graphics card installed on your device. If you're trying to assign the keys to function as a control to adjust the brightness, we suggest that you refer to the
user guide of your graphics card to get more information on how to configure/set your keyboard settings.

On the other hand, you can check this link to more about the Microsoft
Modern keyboard.

Let us know should you need further assistance.