Many Xiaomi smartphone users experience a display that suddenly goes out while reading, watching a video, or waiting for a call, a behavior that can be annoying, especially if the device turns off the backlight at the most inopportune time, often not because of hardware failure, but because of specific power saving settings or software sensors that misinterpret the owner’s actions.
MIUI and the new HyperOS have a lot of algorithms that control screen life, and the standard sleep timer is just the tip of the iceberg, and there are hidden features like Pocket Mode, Ad Blocker, and adaptive brightness that can force the display to go out, and understanding the mechanics of these processes will allow you to regain full control of the device.
In this guide, we will discuss all possible causes of screen fading on Redmi, POCO and Xiaomi smartphones. You will learn how to turn off intrusive functions, check the serviceability of proximity sensors and adjust the timer so that it matches your habits of using the gadget.
Basic sleep timer and lockdown settings
The first and most obvious step is to check the standard display timer. In the MIUI shell, this setting is often hidden in the submenu, and users may not notice that it is set to a minimum value. To change the settings, go to the Settings menu, then select the Screen and brightness section and find the Sleep Mode option. There are intervals from 15 seconds to 10 minutes available.
If your phone goes out after exactly 15 or 30 seconds of inactivity, it means that too short a time is chosen. However, if the screen turns off chaoticly or before the set time, the problem lies deeper, and sometimes a system failure can reset these values after updating the firmware.
⚠️ Setting a maximum latency (e.g. 10 minutes) significantly increases battery consumption, especially if the phone is lying upside down and not locked automatically.
Also worth mentioning is the Pocket Mode feature, which uses a proximity sensor to lock the screen when the device is in the bag. If the sensor is contaminated or closed with a protective film, the screen can go out even when the phone is lying on the table.
The effect of the ad blocker on the display
One of the most common and non-obvious reasons for screen decay on Xiaomi is the built-in ad blocker. In some firmware versions, the blocking algorithm can conflict with running applications, causing forced backlight quenching or flickering, especially for free apps that are saturated with video ads.
To eliminate this factor, you need to temporarily disable the function. Go to Settings → Passwords and Security → Access to personal data (or Special features in older versions). Find the msa (MIUI System Ads) list and turn off the switch. The system will ask you to wait 10 seconds before confirming.
- 📱 Open the security settings and find the section with the advertising services.
- 🔒 Find the msa process and deny it access to data or disable it completely.
- 🔄 Restart the device to make the changes effective.
Once you do this, you can test the phone in applications that have previously been attenuated, and if the problem has disappeared, it's the advertising subsystem that caused the conflict. DNS-filters to block ads without interference with system processes.
What if the msa switch doesn’t turn off?
Problems with the proximity sensor and accelerometer
Xiaomi smartphones are known for their sensitivity to sensor calibration. If the screen goes out while you're talking when you're removing the phone from your ear, or if it doesn't go out when you bring it to your face, calibration is required. Incorrect data from the accelerometer can also make the system think the phone is in your pocket and turn off the screen.
To diagnose and adjust, use the hidden engineering menu. In the Phone app, dial ##6484##. In the menu that opens, select Proximity sensor and follow the instructions on the screen, usually requiring you to close the top of the phone with your hand and remove it several times.
| Parameter | Normal value. | Deviation action |
|---|---|---|
| Approximation sensor | 5.0 (closed), 0.0 (open) | Calibrate in the Engineering Menu |
| accelerometer | 0, 0, 9.8 (alone) | Place it on a flat surface and calibrate it. |
| gyroscope | Stable readings. | Reset the device |
| Brightness (Light) | Changes in light | Check the autobrightness |
If calibration through the engineering menu doesn't work, you can try third-party apps from Google Play, such as "Proximity Sensor Reset/Fix." They allow you to programmatically reset the sensor values to factory ones. In rare cases, the problem is solved only by completely flashing the device or contacting the service center if the sensor is physically defective.
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When a new protective glass is glued, make sure that it has a cutout for sensors or is made of a material that does not block IR radiation, otherwise the screen will go out spontaneously.
Energy saving and battery optimization
Aggressive energy saving policies are another reason why the screen goes out early, and the system may force the display to turn off or down if it thinks the application is running too much power or is not optimized to work in the background.
Check the battery settings for a particular application. Go to Settings → Applications → All applications, select the desired program (for example, a reader or a navigator) and click on Charge Saving. Set the value No restrictions. This will prevent the system from strangling the application and interfering with the screen.
⚠️ Warning: No Limits mode can lead to faster battery discharge if the application is actively running in the background without system control.
Also worth paying attention to is the general energy saving mode: If it is activated (usually indicated by a yellow or blue battery in the status bar), the system limits background activity and brightness. Disable it by tapping the battery icon in the notification curtain or through settings to check if the fading problem will go away.
☑️ Verification of energy saving settings
Third-party applications and software conflicts
Often, third-party programs are responsible for the display’s strange behavior, especially those that control the screen, brightness, or have access rights over other windows. Book reading apps, video players with brightness control gestures, or memory “cleaners” can intercept control of the light sensor.
Try to start your phone in Safe Mode. To do this, press the turn off button, and then hold your finger on the Turn off icon on the screen for a long time until you prompt you to go to Safe Mode. If in this mode the screen stopped going out spontaneously, then the problem is in one of the applications you installed.
- 📉 Remember after installing which application the problems started.
- 🧹 Remove newly installed “optimizers” or launchers.
- 📚 Check the settings of specific applications (readers, browsers) for the presence of your own sleep timers.
Pay special attention to applications that change the theme or add widgets to the lock screen, they may have their own shutdown timers, which are more important than the system, and removing or updating such programs to the current version often solves the problem.
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If the problem has disappeared in Safe Mode, remove the last installed apps until you find the culprit.
Hardware malfunctions and plumes
If the software methods didn't help, it might be the hardware of Xiaomi's smartphones (especially the models with the hardware). AMOLED-Sometimes there is a so-called "dump" of the plume of the display or damage to it, this can manifest itself not only in attenuation, but also in the appearance of stripes, change in colors or a full black screen when the sound is working.
It's also worth checking the power button. If it's locked or has poor contact, it can break the circuit briefly, which the system perceives as a short press to turn off the screen. Try gently pressing the button several times or cleaning it with compressed air (without fanaticism).
In cases where the screen only goes out at a certain angle of inclination or after a device falls, there is a high probability of physical damage to the plume or power controller.