How to completely disable autobrightness on Xiaomi laptop: all ways

Automatic screen brightness adjustment on Xiaomi laptops (RedmiBook series, Mi Notebook Pro, Mi Laptop Air and others) is often a source of annoyance for users. Even with minimal lighting changes, the ambient light sensor adjusts the display backlight, which leads to flickering, inconvenience when working with graphics or video, and sometimes premature wear of the matrix. In this article, we will discuss all possible ways to turn off autobrightness, including hidden Windows settings and proprietary MIUI functions (for models with preinstalled firmware).

The peculiarity of Xiaomi laptops is that the manufacturer often integrates its own brightness control algorithms on top of standard Windows tools. This means that disabling auto-regulation through system parameters may not work - additional manipulation with drivers or the registry will be required. We will look at solutions for different scenarios, from basic settings to advanced methods for advanced users.

Why Auto Brightness Works Differently on Xiaomi than on Other Laptops

Xiaomi laptops use a combined brightness control system that includes:

• 🔹 Hardware light sensor (usually located next to the webcam) that transmits data to the screen controller.
• 🔹 Xiaomi software (Mi Display Center or Xiaomi Quick Settings) that processes sensor signals and adjusts brightness according to its own algorithms.
• 🔹 Windows Standard Mechanisms (Sensor Monitoring Service and Generic PnP Monitor Driver).

Unlike other brands (e.g. Lenovo or HP) where autobrightness is controlled only through Windows, Xiaomi often has duplicate settings, which means that disabling the feature in the system settings does not guarantee its complete deactivation – it may require intervention in proprietary software or drivers.

Key point: on some models (for example, RedmiBook 15 Pro or Mi Notebook Pro X), autobrightness is activated by default even after resetting settings. BIOS. This is due to the energy-saving profiles that Xiaomi is implementing at the level of the company. UEFI.

Method 1: Turning off autobrightness through Windows settings

Let’s start with the most obvious method, the standard Windows 10/11 settings, which will work if your Xiaomi laptop doesn’t have proprietary display management software installed.

1. Open the settings → System → Screen.
2. Find the slider "Change brightness automatically when changing lighting" and move it to the position "Off".
3. If there is no such slider, go to Settings → System → Nutrition and Sleeping Mode → Additional Power Parameters.
4. Select an active power plan and click "Setting up a power plan" → "Change additional power options."
5. In the window open, find the "Screen" section" → "Enable Adaptive Brightness Adjustment" and set the "Off" value for both states (from battery and network).

If the brightness still changes by itself after this action, then the laptop is running Xiaomi's proprietary software.

Slider disabled in "Settings → Screen" |

Adaptive adjustment in power settings disabled |

Rebooted laptop to apply changes |

Brightness checked in different lighting conditions-->

Method 2: Deactivate via Mi Display Center (for laptops with MIUI)

Many Xiaomi laptops (especially models for the Chinese market or with MIUI for PC pre-installed) come with the Mi Display Center app, which is responsible for managing color profiles, reading modes and, importantly, autobrightness.

1. Find the Mi Display Center (or Xiaomi Quick Settings) app in the Start menu and open it.

Important: On some models (e.g. RedmiBook 14 II), the autobrightness option in the Mi Display Center may be hidden if the laptop is running from the network. Connect the charger and check the settings again.

If the application is not in the Start menu, try to find it through a search by system or check the folder C:\Program Files\Xiaomi\Mi Display Center. On Windows 11 laptops, branded software can be integrated into the Xiaomi control panel (the icon in the tray next to the clock).

Method 3: Disconnect via Device Manager (for power users)

If standard methods don't work, the problem may be in the light sensor driver, and then you can turn the device off via Device Manager.

1. Press Win + X and select Device Manager.
2. Deploy the Sensors section.
3. Find a device called the Light Sensor (Ambient Light Sensor or ALS).
4. Right-click on it and select "Disable the device".
5. Confirm the action in the window that appears.

After the sensor is turned off, the autobrightness will stop working, but side effects may occur:

• 🔸 Certain functions MIUI (For example, night mode may not work properly.
• 🔸 In Windows settings, the brightness adjustment slider will disappear (rebooted is solved by rebooting).
• 🔸 In the models with OLED-screens (for example, Mi Notebook Pro X 2022) can be confused by color calibration.

If the brightness is still changing after the sensor is turned off, then it's not the hardware sensor that's responsible for the adjustment, but the software algorithm, and then the next way will help.

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Before you turn off the light sensor, make a system restore point (control panel → recovery → system recovery setting) that will quickly bring everything back if there are problems with the display.

Method 4: Editing the Windows Registry (Advanced Method)

If all the previous methods failed, the most radical option is to edit the registry, which blocks auto-brightness at the system level, but requires caution: incorrect changes can lead to failures.

Instructions:

1. Press Win + R, enter regedit and press Enter.
2. Cross the path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\CapabilityAccessManager\ConsentStore\location\NonPackaged
3. Find the Value parameter and change it from 1 to 0.
4. Next, go to the section: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\CapabilityAccessManager\ConsentStore\light\NonPackaged And also install Value in 0.
5. Reboot the laptop.

This method disables system and third-party applications from accessing the light sensor, and after applying it, check if the color settings (especially on the color sensor) have gone wrong. OLED-display).

⚠️ Note: Before editing the registry, be sure to create a backup copy of it (File) → Exports: Incorrect changes may make Windows unloadable.

Method 5: Disconnect via BIOS/UEFI (for individual models)

On some Xiaomi laptops (such as the 2020 Mi Notebook Pro 15.6 or RedmiBook 16), autobrightness is controlled at the BIOS level.This means that even after disabling all settings in Windows, the feature can continue to work.

To deactivate it completely:

1. Restart your laptop and press F2 or Del (depending on the model) to log in to the BIOS when you start.
2. Go to the "Advanced" or "Configuration" section.
3. Find the option “Ambient Light Sensor”, “Auto Brightness” or “Display Adaptive Brightness”.
4. Set the value "Disabled".
5. Save settings (F10) and restart the laptop.

Note that on new models (2023-2026), the autobrightness option in the BIOS can be hidden, in which case only updating the BIOS firmware to the latest version will help (you can download it on the official Xiaomi website).

What to do if nothing helps: radical measures

If all of these methods fail, extreme measures remain, and should only be applied if the avtobrightness really interferes with work (for example, when processing photos or editing videos).

• 🛠️ Remove the light sensor driver: Open Device Manager. Find the light sensor in the Sensor section. Right-click and select Delete Device. Check "Delete Driver Programs for this device".

Sensor Monitoring Service

1. Press Win + R, enter services.msc.
2. Find the Sensor Monitoring Service.
3. Right-click → “Properties” → “Startup Type: Disabled”.

Use of third-party utilities:

F.lux

DisplayCal

⚠️ Attention: Removing the light sensor driver may cause Windows Hello to malfunction and automatically lock the screen. OLED-displays, it can also cause problems with color reproduction.

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If the autobrightness continues to work after all the manipulations, the problem may be the screen firmware, in which case only contacting the Xiaomi service center to flash the matrix controller will help.

FAQ: Frequent questions about autobrightness on Xiaomi