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Reducing minimum laptop backlight brightness on Windows 10.

Anonymous
2018-05-06T03:03:37+00:00

Hello,

I have noticed that my brightness in windows cannot get as low as it can in other operating systems on the same exact device. The 0% brightness setting seems to be artificially higher in windows than the actual brightness values sent to control the backlight.

For example, where the 0 brightness setting is usually and should be resulting in a switched-off backlight, as per the standard behavior of the ACPI backlight my laptop has, windows' 0% setting seems to be somewhere around the regular 25 brightness value.

Can I force Windows 10 to give me control over the actual, raw brightness values that are used to control the backlight? Or at least, force it to map '0%' to a lower value?

In case it matters, here is my display hardware information: My display adapter is an Intel HD Graphics 620 (plus an NVIDIA GeForce 940MX), and I am unsure of the backlight controller's model, though I know it is an ACPI-controlled device that accepts a numerical input level between 1 and somewhere around 200. The laptop's display itself is simply identified as a "Generic PnP Monitor", with no identifiable manufacturer or model information.

**And also, to clarify, because I have seen other questions like this dismissed with some sort of copy-pasted set of instructions on how to change the brightness setting:**That is NOT what I need, I already know how to use the windows settings to change the brightness percentage. My problem, as with others that have been poorly answered or dismissed on here for no good reason, is that the 0% brightness level is still too high, NOT that I don't know how to change my brightness setting.

Windows for home | Windows 10 | Devices and drivers

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  1. Anonymous
    2018-05-06T03:22:03+00:00

    If you go to nVidia control Panel, it should offer you to adjust brightness appropriately. This brightness problem generally happens due to nVidia who takes control of Windows brightness setting from Windows' default display adapter.

    E for Excel, unfortunately, my NVIDIA card has no control over my display's brightness. It is the secondary discrete card, and so the NVIDIA control panel only offers me DirectX, OpenGL, and PhysX-related settings - nothing relating to my actual display hardware. I have also checked the Intel GPU settings, for good measure, and it also lacks a brightness control tool. I think this issue is related more to the way Windows itself gives a percentage abstraction over top of actual display brightness levels used by the laptop hardware, and the minimum setting is simply too high for my liking. Thank you for your suggestion, though.

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  2. Vijay A. Verma 104.8K Reputation points Volunteer Moderator
    2018-05-06T03:09:44+00:00

    If you go to nVidia control Panel, it should offer you to adjust brightness appropriately. This brightness problem generally happens due to nVidia who takes control of Windows brightness setting from Windows' default display adapter.

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