Xiaomi, Redmi and Poco smartphone owners often experience a display that goes out at the most inopportune moment, such as reading long articles, browsing recipes in the kitchen, or learning how to navigate in the car. The standard MIUI and HyperOS energy saving settings are set to quickly turn off the backlights, saving charge but creating discomfort.
The problem may lie not only in the timer, but also in the operation of light sensors or software conflicts. In this article, we will discuss all existing methods for extending active display time, you will learn how to adjust system parameters, use hidden functions and fix hardware-level malfunctions.
Some users confuse a conventional screen shutdown with a lock due to advertising or sensor failures. Attenuation is a systematic decrease in brightness before full extinction, which is triggered by the system timer. Understanding the difference between a software timer and a hardware sensor will help you choose the right method of solving the problem.
Standard timer setting through the menu
The most obvious and safe way to change the time before the display is turned off is in the basic system settings. MIUI interface may vary slightly depending on the Android version, but the logic remains the same. You need to find the partition responsible for locking and security of the device.
Go to the menu and select Settings → Lock screen. This is where the slider or waiting time list is located. Standardly, the system offers intervals from 15 seconds to 10 minutes. For most scenarios, the optimal value is 2 or 5 minutes.
⚠️ Note: Setting a maximum time (10 minutes) or “Do not turn off” mode can lead to accelerated battery discharge and the risk of matrix burnout if one element is statically displayed on the screen for a long time.
If the standard settings are not saved or reset after rebooting, it is possible that the system has activated an aggressive power saving mode. Check the battery settings and make sure that the current shell does not have a limit on background activity that can force the screen to extinguish.
Use of the "Do not turn off" mode in special opportunities
For situations where the phone is used as a navigator or digital photo frame, a regular 10 minute timer may not be enough.In Android, there is a hidden developer feature or a special mode to keep the screen on constantly while the device is connected to charging.
To activate this feature, go to Settings → Advanced Settings → Developer. If the developer menu is hidden, activate it by quickly clicking seven times on the build number in the About Phone section. Find the "Stay awake" item and turn it on.
- 🔋 The function only works when the charger is connected, which is safe for the battery.
- 🚫 When the cable is turned off, the timer will again act according to standard settings.
- ⚙️ This mode ignores the timer settings in the regular menu, forcibly leaving the backlight active.
Some versions of the shell also have a Do Not Turn Off widget in the notification curtain or in the control menu, which can be added through editing the Quick Settings panel, which allows you to switch mode with one touch without diving deep into the menu.
☑️ Checking screen settings
Problems with the proximity and illumination sensor
Users often complain that the screen goes off instantly while talking or watching a video, even if the timer is set for 5 minutes.
MIUI has a "Mode in your pocket" feature that forces the screen to lock if the sensor obscures something. To check this, go to Settings → Lock screen and turn off the "Mode in your pocket" option. This will remove false positives when the phone is lying on a soft surface.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The screen goes out when you bring it to your ear. | Norma (approximation sensor) | No need to take action |
| Gasnet while watching the video lying down | Hand-held sensor locked. | Change the grip or disable the sensor |
| Blinks and goes out in bright light | Failure of autobrightness | Turn off the autobrightness in the curtain |
| Gasnet immediately after inclusion | Pocket mode. | Disable in the lock settings |
If the problem only occurs in certain applications, check their resolution. Some video players or readers have their own activity timers that can overlap the system settings, in which case you need to look for the settings inside the application itself.
How to Calibrate the Approach Sensor on Xiaomi?
Effects of reading mode and blue light filter
Xiaomi’s shell features an advanced Read Mode that mimics electronic paper, which users sometimes perceive as changing contrast and dimming as fading the screen, and can be activated on a schedule or when running certain applications.
Check the settings in Settings → Screen → Reading Mode. If it's on, try changing it or turning it off completely. Also, look for "Sleep Mode" or "Digital Well-being," which can darken the interface at night.
The blue light filter also affects the perception of brightness, so when it's activated, the screen becomes yellower and darker, and it's not really fading, but it's creating a dim display, and you can adjust the filter level in the notification curtain or in the screen settings.
💡
If you use third-party reading apps (like Moon+ Reader), check their internal settings. Often there's a separate auto-lock timer that's not connected to the Android system.
Third-party apps and ad blocking
One of the most common causes of sudden screen blackouts is background processes or pop-up ads. In free versions of applications, ad units can block the interface, and the system regards this as the end of the user's session, triggering a lock timer.
And there are some specialty utilities, like Caffeine or Keep Screen On, that add a quick access button to temporarily stop fading, and they're useful when you need to show someone information on the screen quickly without changing your system settings.
- 📱 Cliner apps can aggressively close background processes by resetting an activity timer.
- 🚫 Advertising modules in games often cause the screen to darken before showing a video clip.
- ⏱️ Using timer widgets (such as Kitchen Timer) can prevent blocking while the countdown is underway.
We recommend that you look at exactly when the decay occurs, and if it happens at exactly the same time intervals in different applications, it's a systemic problem, if only one application is to blame, or if it's the ads inside it.
⚠️ Warning: Installing apps from unknown sources to control the screen can lead to malware. Use only proven utilities from Google Play with high ratings.
Hardware malfunctions and burnout of the matrix
In rare cases, screen fading can be a sign of a physical malfunction. If the screen goes out unevenly (spots appear), only part of the matrix flickers or goes out, software methods will not help. OLED-screens after prolonged use or mechanical damage.
It's also worth checking the display plume if the phone has recently been hit or dropped, and unstable contact can cause periodic loss of image, and only a service center diagnostic can help.
If the screen just slowly reduces the brightness to zero and this behavior does not change after resetting the settings to the factory, the light sensor may have failed, it can "think" that it is in complete darkness, and remove the backlight to a minimum.
💡
If the software reset and flashing did not solve the problem with the fading screen, a hardware breakdown of the sensor or the display plume is likely.