Dimming the screen on Xiaomi smartphones is one of the most annoying features for users who appreciate the stable brightness of the display. The system automatically reduces the backlight when battery levels are low, in reading mode or when energy saving is activated, which is not always convenient, especially for the Redmi Note 12, POCO X5 and Mi 11 models, where brightness control algorithms have become more aggressive with the release of MIUI 14/15.
In this article, we will analyze all possible causes of automatic dimming and provide 5 working ways to disable it - from standard settings to hidden developer parameters. You will learn how to block the dimming of the battery, deactivate adaptive lighting and even manually edit system files (for advanced users). MIUI 12-15 and tested on devices of 2020-2026 release.
Why Xiaomi’s screen is getting darker: 4 main reasons
Before you turn off the function, it is important to understand what causes the dimming. At Xiaomi, several mechanisms are responsible for this:
- 🔋 Low-charge energy saving – the system forces the brightness to drop below 30% when the battery is discharged to 15-20%, and this applies to all models starting with the Redmi 9.
- 🌓 Adaptive brightness - the light sensor automatically adjusts the backlight depending on the ambient light. MIUI 14+ The algorithm has become more sensitive, leading to sharp jumps.
- 📖 Reading mode: Includes a warm filter and reduces brightness to a comfortable 40-50%, even if you are not reading a book.
- 🔄 Performance optimization – on weak chipsets (e.g. Snapdragon) 4xx Helio Gxx, or Helio Gxx, can artificially limit brightness to reduce the load on the system. GPU.
On some devices (such as the POCO F4 or Xiaomi 12T), the dimming is due to the vision protection feature, which is activated after 22:00, which is hidden in the Screen → Vision Protection section and is often ignored by users.
⚠️ Note: If the screen only darkens in certain applications (for example, YouTube or TikTok), the problem may be the settings of the programs themselves.
Method 1: Turning off adaptive brightness in standard settings
The simplest method is to deactivate the automatic backlight adjustment, which works through the light sensor and often works incorrectly, especially in rooms with uneven lights.
Instructions:
- Open the Settings → Screen.
- Find the Adaptive Brightness item (in some firmwares – Automatic Brightness Adjustment).
- Move the slider to the off position.
- Go back and manually set a comfortable brightness level (recommended 60-80% for the best lighting). AMOLED-screen).
On MIUI 15, the path may differ: Settings → Display → Brightness and Colors → Adaptive Brightness. If there is no point, then your model does not support the light sensor (for example, the budget Redmi A1 or POCO C40).
Reboot your smartphone|Check the brightness in a dark and bright room|Make sure that the notification panel does not have an "Autolight" icon"|Open the camera – sometimes it resets the settings-->
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If the adaptive brightness is turned off, check Settings → Battery → Power Saving Mode. In Ultra mode, the system forcibly reduces the brightness to 50%.
Method 2: Deactivation of vision protection and reading mode
The Eye Comfort feature not only adds yellowness, but also automatically reduces brightness to 40-50%, and can be activated on a schedule or when reading mode is activated.
How to turn it off:
- Go to Settings → Screen → Protection of vision.
- Turn off the Slider Eye Protection.
- Find Reading Mode below and deactivate it.
- Check the Schedule section – if there is a time frame set there (for example, from 22:00 to 7:00), reset them.
On some devices (Xiaomi 13, POCO F5), these settings are hidden deeper: Settings → Display → Additional → Vision Protection. If there is no point, then your model does not support hardware protection (for example, Redmi 10A).
| Xiaomi model | Supports vision protection? | Where do I look for settings? |
|---|---|---|
| Redmi Note 12 Pro+ | Yeah (hardware) | Settings → Screen → Protection of vision |
| POCO X5 Pro | Yes (programmatic) | Settings → Display → Additional |
| Xiaomi 12T | Yeah (with light sensor) | Settings → Screen → Brightness and Colors |
| Redmi A2 | No. | — |
⚠️ Attention: On devices with AMOLED-screens (Xiaomi 13 Ultra, POCO F4 GT) Long-term use of maximum brightness (100%) can cause pixels to burn out.
Method 3: Disabling the power saving and battery limitations
MIUI aggressively controls brightness when the battery charge drops below 20 percent. Even if the adaptive brightness is turned off, the system can force the backlight to lower the backlight to extend the operating time, and this applies to all devices starting with MIUI 12.
How to remove restrictions:
- Open the Settings. → Battery.
- Select Power Saving Mode.
- Set the value Off or Balanced (but not Ultra!).
- Go back and tap on the battery settings (or optional).
- Find the Productivity Limitation item and turn it off.
Nana POCO-devices (e.g., devices, POCO X3 Pro) path may be different: Settings → Battery → Regimes → Performance: If there is no Performance Limit, your model does not support this feature (e.g. Redmi). 9C).
Yes, always below 20% |Yes, but only in energy saving mode |No, didn't notice |I don't know, I didn't check-->
For custom firmware devices (such as Xiaomi.eu or Pixel Experience), additional settings may be required via Settings → For developers → Background Limitation.
Method 4: Set up the developer’s settings (for experienced)
If standard methods don't work, you can use the hidden developer settings to disable forced dimming at the system level, but you need to be careful.
Instructions:
- Activate Developer Mode: Go to Settings → About Phone. Tap 7 times on MIUI Version (you will be notified "You are a developer").
Settings → Additional → For Developers
Turn off automatic brightness
Disable auto-brightness
Limitation of brightness
Brightness limit
Out.
Reset the device.
On some firmware (MIUI 15 for Xiaomi 14), these items may be called differently:
- Auto-brightness adjustment – Adaptive brightness control.
- Low power brightness limit is a low power limit.
- Display power saving – energy saving screen.
What to do if the developer’s settings do not have the right items?
⚠️ Warning: Changing the settings in developer mode can lead to unstable screen performance (flickering, incorrect color reproduction). If artifacts appear after the changes, reset the settings to factory or return the standard values.
Method 5: Manual editing of system files (root)
This method is only suitable for users with root rights and custom firmware. Wrong actions can bring the device down!
If all previous methods failed, you can manually edit the system files responsible for brightness control.
- 📱 Device with unlocked bootloader and root rights (Magisk).
- 🛠️ File Manager with access to the root folder (e.g. Root Explorer or Mixplorer).
- 📝 Backup of the system (required!).
Instructions:
- Open the file manager and go along the way: /system/vendor/overlay/ or /system/system_ext/overlay/.
- Find files with names: DisplayBrightnessOverlay.apk PowerHintOverlay.apk BrightnessPolicy.config
Make a backup of these files (copy to a safe place).
.bak
Reset the device.
Once the system is restarted, it will create standard configuration files with no brightness limits. If the screen is not working properly, return the backups.
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Editing system files is a last resort, and 90 percent of the time, you just need to turn off adaptive brightness and energy saving in standard settings. Only use root methods if other methods don't work!
More tips: how to avoid blackout in the future
To prevent screen dimming from returning after a system update or reset, follow these guidelines:
- 🔄 Turn off automatic updates MIUI: Go to Settings. → The phone. → Update System. Tap three dots in the top right corner and select Update Settings. Turn off Autoboot and Update Notifications.
- 📵 Use the brightness fixing app: Lux Auto Brightness (requires) ADB-Screen Filter (allows you to set the minimum brightness below the system).
- 🔋 Watch the battery health: If the battery is worn out by more than 30%, the system will be more aggressive in reducing the brightness. → Battery → Battery status.
For devices with AMOLED-screens (Xiaomi 13 Pro, POCO F5) We recommend using dark themes and adaptive refresh rates (if supported) to reduce display load and reduce the risk of forced dimming.