How to permanently turn off the fading screen on Xiaomi: all the ways to MIUI 14/15

The screen of your Xiaomi, Redmi or POCO Is it going out too fast, interfering with reading, watching videos, or working with the navigator? MIUI It's a screen sleep timer, a function designed to save battery power, but in some scenarios (e.g., using the phone as a battery). GPS-During long presentations or during navigator presentations, automatically turning off the display becomes a real problem.

In this article, we will analyze all the current ways to disable screen fade on Xiaomi devices running MIUI 14/15 (including the Redmi Note 12, POCO X5, Xiaomi 13T You'll learn how to change the timer through standard settings, use developer modes, apply ADB-commands for permanent shutdown, and what applications will help to bypass the limitations of the system. MIUI, which the manufacturer does not advertise, but which allow you to flexibly adjust the behavior of the screen.

Important: Some methods require developer rights or PC connectivity. If you’re a beginner, start with simple methods (sections 2–3), advanced instructions (sections 4–6) will be helpful to experienced users.

1. Standard method: changing the sleep timer in the MIUI settings

The easiest and safest method is to increase the screen time to fade through the settings menu, which works on all Xiaomi devices without any additional manipulation and does not require root rights.

Instructions:

• 📱 Open the Settings app (cog icon on the home screen).
• 🔍 Go to the Screen section (or Display on some firmware).
• ⏱️ Find the sleep timer item (may be called Sleep Mode or Screen Shutdown).
• 🔢 Select the maximum value – it is usually 30 minutes (on some models up to 1 hour).

Limitation of method: Even a maximum timer (30 minutes) may not be sufficient for some tasks (e.g., when using the phone as a camera monitor or while streaming).

2. "No sleep" mode through the developer's parameters

If the standard 30 minutes are not enough, you can activate the hidden mode “No sleep”, which completely disables the screen fade when connecting to a charge.

How to set the mode:

1. Activate the developer’s parameters: 🔧 Go to Settings. → The phone. 🔨 7 times quickly tap on the item Version MIUI (A notification will appear saying, “You have become a developer»).

Settings

Additionally. → Developer parameters

No sleep.

Stay awake

⚡ Turn on the switch – now the screen will not go out when connected to the charger.

⚠️ Warning: this mode only works when charging. If you need to turn off the screen fade on the battery, use the methods in the following sections.

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If the item No sleep is not in the developer’s parameters, update MIUI before the latest version or use it ADB-section 5.

3.Using apps to block screen sleep

If the system settings don't provide the flexibility you need, third-party applications will come to the rescue.

• 🕒 Set an arbitrary time before extinction (for example, 2 or 5 hours).
• 🔄 Automatically turn on/off sleep blockages on schedule.
• 📱 Working in the background without root rights.

Top.-3 Proven applications for Xiaomi:

🔹 How to set up: after installing any of the applications, it is enough to turn it on in the notification bar (swipe down) → Find the app icon → Some programs (e.g. Stay Alive!) require special permissions in Android settings:

1. 🔧 Go to Settings. → Annexes → Application management.
2. 🔍 Find the installed app (for example, Stay Alive!).
3. 🔒 Enable permissions to Change system settings and display over other windows.

4.Switch off screen sleep via ADB (permanent solution)

If you need to turn off screen dimming (including battery life) completely, rather than just increasing the timer, ADB (Android Debug Bridge) will help, a method that requires connecting the phone to a PC, but gives the most reliable result without root rights.

📌 Preparation:

• 💻 Install. ADB-PC drivers (Windows/macOS/Linux).
• 🔌 Put the debugging on. USB on the phone: Go to Settings → Additionally. → Developer settings. Activate Debugging by USB.

🔗 Connect your phone to your PC through USB-Cable (use the original cable for stability).

🛠️ Instructions for shutting down sleep:

1. Open the Command Prompt (Windows) or Terminal (macOS/Linux) on your PC.
2. Enter the command to check the connection: Adb devices must appear serial number of your device.
3. Use the command to turn off the screen: adb shell settings put global stay_on_while_plugged_in 3 3 — Turns off sleep and when charging, and on the battery. 1 — only when charging from the network. 2 — only USB-connection.

Restart your phone to apply the changes.

⚠️ Warning: Once this command is executed, the screen will never go out, even if the phone is lying dormant:

• 🔋 Quick battery discharge (if not connected to charging).
• 📱 Overheating of the screen with prolonged inclusion.
• 👁️ The risk of burnout OLED-matrices (on models with AMOLED-screen).

To return the standard behavior, follow the command:

adb shell settings put global stay_on_while_plugged_in 0

5. Hidden MIUI settings: "Exhibition" mode

MIUI has a hidden Demo Mode (or “Exhibition”) mode, originally designed to showcase phones in stores, which never goes out, and also disables notifications and some system restrictions.

🔧 How to activate:

1. Open the Phone app and type the combination: ##3646633## (some models may not work – see the alternative below).
2. In the Engineering Mode menu, go to the Display section.
3. Find the Demo Mode and activate it.
4. Reboot the phone.

🔄 Alternative method (through ADB):

adb shell am start -n com.android.settings/.DevelopmentSettings


adb shell settings put global sys_demo_mode 1

⚠️ Attention: in the “Exhibition” mode»:

• 📵 All notifications (calls) are turned off, SMS, messengers).
• 🔒 Some system applications (e.g. Mi Account) are not working).
• 🔄 To exit the mode, repeat the command with the parameter 0: adb shell settings put global sys_demo_mode 0

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The "Exhibition" mode is only suitable for temporary use (for example, in presentations). ADB-section 4.

6.Switching off sleep for individual applications

If you want your screen to stay on only certain programs (like Google Maps, YouTube, or Waze), you can set exceptions without completely turning off your sleep timer.

🎯 Method 1: through settings MIUI

1. Open Settings → Applications → Application Management.
2. Select the application you want (such as Google Maps).
3. Slip on the Permits. → Additionally.
4. Activate the option to display over other windows (if any).
5. Turn on Ignore Battery Optimization.

🎯 Method 2: Using the Stay Alive app!

• 📥 Install the app from Google Play.
• 🔧 Go to the Appendix section.
• ➕ Add programs for which you want to turn off screen sleep.
• 🔄 Select the mode Hold the screen on.

📌 Example: If you use your phone as a navigator in your car, add Google Maps or Yandex.Navigator to the list of exceptions. The screen will remain on only in these applications, and in other cases, the sleep timer will work as usual.

7 Problems and Solutions: Why does the screen go out anyway?

Even after one of these methods is used, the screen may continue to go out.

🔍 Diagnosis: If none of the methods worked, check:

• 📱 Version MIUI: Some old firmware (below) MIUI 12 may not support modern teams.
• 🔧 Root rights: Custom firmware (e.g. LineageOS) may require Magisk.
• 🛠️ Hardware malfunctions: if the screen goes out immediately after turning on - there may be a problem with the proximity sensor or the plume.

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If you use a magnetic lock case (for example, for the Xiaomi Mi 11), it can force the screen to lock. Try temporarily removing the case or disabling the Magnetic Sensor feature in the display settings.

FAQ: Answers to Frequent Questions