Why wallpaper on Xiaomi is darkening: reasons and ways to restore brightness

Have you noticed that the wallpaper on your Xiaomi (be it a smartphone, TV or tablet) has become dull, as if covered with gray film? This is a common problem faced by users of the brand’s devices, from budget Redmi to flagship Mi TV Q2. In some cases, the darkening occurs gradually, in others – abruptly after the system update, the reasons can be hidden in software failures and hardware features of the screen.

In this article, we will discuss in detail all possible causes of wallpaper brightness changes, including hidden settings MIUI and PatchWall (screens for TVs), as well as give step-by-step instructions for diagnosing and fixing the problem. Particular attention will be paid to cases where darkening is associated with automatic color temperature regulation or graphic rendering errors after updates. If your Xiaomi has lost color juiciness, you will find a solution here.

1. Automatic color correction in MIUI/PatchWall

The most common reason for wallpaper darkening is the adaptive screen adjustment feature enabled, which can be Read, Vision Protection or Adaptive Brightness on Xiaomi smartphones, and Dynamic Contrast settings on PatchWall on TVs, which automatically reduce brightness and saturation to reduce eye strain, but often do so too aggressively.

For example, Mi TV Q1E and Redmi Smart TV X have Eco-Lighting activated by default, which dulls the colors in the dark, the problem is that users rarely notice it turning on — the system does this on its own based on time or light data (if there is an ambient light sensor).

• 📱 On smartphones: check the settings → Screen. → Reading mode and Settings → Screen. → Color scheme.
• 📺 On TVs: Go to Settings → Picture → Additional settings → Dynamic contrast.
• 🌓 Time of day: some models (Mi 11 Ultra, Redmi Note 12 Pro)+) have a separate night profile that may affect wallpaper.

⚠️ Note: In the TVs Xiaomi 2022-2026 release function AI Master for Picture sometimes conflicts with custom wallpaper by forcefully applying "cinema" or "sport" filters. → Picture → AI-optimization.

2. Rendering errors after firmware update

If the wallpaper went dark immediately after the MIUI or PatchWall update, the fault is the graphics engine bugs, especially for MediaTek-based devices (e.g. Redmi 10C, Poco M5), where display drivers often conflict with new versions of the shell.

• 🖼️ The wallpaper becomes "faded", as if a gray filter is applied to them.
• 🔄 When changing the wallpaper through the gallery, the colors return to normal for a second, then dim again.
• 📊 In the screen settings, the brightness slider works, but this does not affect the wallpaper.

The solution depends on the model:

1. For smartphones: try resetting the Themes app settings (Settings → Applications → Application Management → Themes → Storage → Clear data).
2. For TVs: reset the picture settings to factory (Settings → Picture → Reset).
3. Universal method: roll back the firmware to the previous version (instructions below in the section about firmware).

Hardware problems: illumination and matrix

If software methods have not worked, the reason may be physical wear and tear of the screen, which is true for devices older than 3-4 years, where:

• 💡 Backlight: In LED-Xiaomi TV panels degrade LEDs over time, which leads to uneven darkening (especially noticeable on white wallpaper).
• 📱 Matrix: in AMOLED-Smartphone screens (Mi) 10T Pro, Black Shark 4) can manifest burn-in - "burnout" of pixels, which makes the wallpaper seem dull against the background of unchanged interface elements.
• 🔌 Trains: Mi Pad 5 tablets sometimes leave the display plume, which leads to distortion of colors.

How to check:

1. Look at the screen from an angle - if the brightness of the wallpaper changes when the viewing angle changes, the problem is in the matrix.
2. Run the burn-in test: open a clean red/green/blue image to the full screen. If the colors are uneven, the matrix is worn out.
3. For TVs: Turn on the Lamp mode (in the service menu) - if the backlight is flashing or shining dimly, you need a replacement LED-ribbon.

⚠️ Note: In Xiaomi TVs 2020-2021 (e.g. Mi) TV 4S 50") there is a frequent local darkening defect due to poor quality LEDs. If the warranty is still valid, contact the service center - this is a sign of marriage.

4. Conflict of themes and launchers

In the Xiaomi ecosystem, wallpaper is closely linked to the Themes app and the current launcher. If you use third-party themes or alternative launchers (such as HyperOS Launcher on new devices), there may be a display conflict:

• 🎨 Reset themes: sometimes wallpapers get dim due to data corruption in the Topic app. Try resetting it (see instructions above).
• 🔄 Cash wallpaper: in Xiaomi TVs, the cache of wallpaper is stored in /data/system/wallpaper. Cleaning it could bring back the colors.
• 📲 Launchers: In POCO Launcher and Mi Home Launcher have separate transparency settings for wallpaper. check them in launcher settings.

For smartphones:

adb shell pm clear com.miui.home

This command will reset the launcher settings (app data will not be affected).

Delete all unofficial themes |Disable "Adaptive icons" in the launcher settings |Reboot device |Check wallpaper in safe mode (hold the power button → "Safe mode")

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5. Energy saving and productivity settings

Xiaomi’s power saving and performance modes can limit GPU resources, leading to simplified wallpaper drawing (reduction of color bits or HDR switching off).

• 🔋 Smartphones: in Ultra-energy saving mode (disables hardware acceleration of graphics).
• ⚡ TVs: activated Eco-mode (limits the brightness of the backlight to 70%).
• 🎮 Black Shark 5 Pro in Balanced mode dulls the colors of background images.

How to fix it:

1. On smartphones: go to Settings → Battery → Power saving modes and turn off all restrictions for the system.
2. On TVs: in Settings → Energy saving, select Standard or Dynamic mode.
3. For gaming devices: In Shark Space, turn off the Background Optimization option.

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If the wallpaper is still dim after the power saving is turned off, try temporarily increasing the refresh rate of the screen (for example, from 60 Hz to 90 Hz), which will sometimes wake up the GPU.

6. Viruses and malicious applications

Rarely, there are cases where the wallpaper darkening is caused by malware that puts filters on the system interface, usually accompanied by other symptoms:

• 📥 Unexpected banner ads on top of wallpaper.
• 🔄 Spontaneous change of wallpaper to unknown images.
• 📊 New "unknown" applications appear in Settings → Annexes.

What to do:

1. Check the device with an antivirus (Mi Security or Malwarebytes).
2. Go to Settings → Apps → Permissions → Special Access → Overlay on other apps and disable suspicious programs.
3. If there is a problem on the TV, perform a full reset (Settings → About device → Resetting).

⚠️ Attention: In 2023, a vulnerability in PatchWall was identified that allows attackers to apply filters to the TV screen via Wi-Fi. Update the firmware to the latest version if you use Mi. TV 5 Pro or Redmi Smart TV X2022.

7. How to return the wallpaper brightness: step-by-step instructions

If you don’t find the exact cause, follow this universal algorithm:

1. Step 1: Reboot: Turn off the device for 1 minute, then turn it on. Sometimes this resets graphic artifacts.
2. Step 2. Reset screen settings: Smartphone: Settings → Screen → Reset color settings. Television: Settings → Picture → Reset.

Step 3. Wallpaper check:

Xiaomi

Minimalism

Nature.

Step 4: Update/Return firmware:

see FAQ

Step 5: Screen diagnostics:

Lagom LCD Test

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If none of the methods worked, and the device is warranty, contact the service center. In 60% of cases, the darkening of the wallpaper on new devices (< 1 year) is associated with a factory defect of the matrix or backlight.

FAQ: Frequent questions