Why Xiaomi itself lights up and goes out the screen: reasons and solutions

The situation when the screen of a Xiaomi or Redmi smartphone suddenly lights up for a few seconds in a locked state is familiar to many owners. This phenomenon can be annoying, especially at night when a sudden flash of light wakes the owner, or cause concern about battery discharge. Often users notice that the display lights up without notice, glows for a couple of seconds and goes out again, indicating the operation of certain system sensors or software conflicts.

There are many reasons for this behavior, from the trivial setup of the “Raise to Turn” function to the more complex problems with the touchscreen calibration. The MIUI operating system and the new HyperOS have many smart features that are designed to make it easier to interact with your smartphone, but sometimes they work incorrectly. Understanding the mechanism of these functions will help you quickly fix the problem.

In this article, we will discuss in detail all possible scenarios why your Xiaomi behaves this way. We will look at software settings, features of the proximity sensor and possible hardware malfunctions. It is critical to immediately check whether the on button or the side lock key physically sticks, since this is the most common mechanical reason for spontaneous lighting.

The function “Raise to turn on” and motion sensors

One of the most common reasons that a screen lights up is the activated Lift to wake feature, which uses an accelerometer and a gyroscope to determine the position of the device in space, and if you accidentally hit a phone on a table or it moved on an uneven surface, the system may interpret that motion as a wake-up call.

In some cases, motion sensors are sensitive, which means that even vibration from a passing truck or a nearby washing machine can cause a false alarm. The screen lights up, the system realizes that the user did not pick up the device, and after a couple of seconds it extinguishes it to save energy.

To check and disable this feature, you need to go to lock settings. The path may vary depending on the firmware version, but it usually looks like this: Settings → Lock screen → Raise to turn on. If the slider is active, try turning it off and observe the behavior of the smartphone throughout the day.

⚠️ Warning: Disabling the “Raise to Turn” feature may reduce the usability of a smartphone with one hand, but is guaranteed to eliminate false awakenings from the occasional vibrations of a table or bag.

It’s also worth noting that newer versions of MIUI can combine this feature with “On in the pocket” mode. If the algorithms are wrong, the phone will respond to any change in position in space, which is especially true for owners of the Redmi Note and Xiaomi Mi series models.

False positives in the pocket and protection mode

Another classic scenario is that the phone lights up in a pants pocket or bag, and that's called Pocket Mode, which aims to prevent accidental calls or applications from being launched when the screen comes into contact with fabric, but if the proximity sensor is contaminated or malfunctioning, the phone can "think" it's been taken out of its pocket and turn on the screen.

The mechanism is simple: the light and proximity sensor detects the change in light flux. When you put the phone in a dark pocket, the sensor responds to a dimming. When the slightest movement of tissue or pressure changes on the screen, the system can interpret this as the removal of the device, briefly turning on the display for inspection.

To resolve the problem, follow the following steps:

• 📱 Go to Settings. → Lock screen and find the item "Pocket mode».
• 🧹 Carefully wipe the top of the screen (the area of the speaker), where the sensor is located.
• 🔄 Reboot the device to reset the cache of sensors.
• 🚫 Try to temporarily disable the function if the problem persists.

Often the problem is with the safety glass, if it's curved or has a thick black frame that covers the sensor, Pocket Mode will be disrupted, in which case the screen will light up chaotically, reacting to shadows and movement of fabric.

💡

Use a transparent protective glass with a cutout for the sensor or a high-quality hydrogel film that does not create optical interference for the proximity sensor.

Problems with touchscreen and sensor calibration

If the screen lights up and goes out for no apparent reason, and you notice “phantom” presses or chaotic interface behavior, the problem may lie in the touchscreen itself. capacitive screens used in Xiaomi are sensitive to static electricity, hand moisture and the quality of the charger.

Using cheap charging units without the original cable can interfere with the phone’s power grid. When charging or even while operating from the network, the screen can briefly light up from voltage surges that the sensor perceives as touch, a phenomenon known as “ghost touch.”

There is an engineering menu in MIUI to diagnose and calibrate the sensor, and be careful when you use it.

##6484##

From the menu that opens, select Touchpanel or Single Touch. Follow the on-screen instructions to check the response of all areas of the display. If you see the phone registering clicks without you, you need to calibrate or replace the sensor.

⚠️ Note: Do not reset the settings in the engineering menu if you are not sure of your actions. Use only the testing and calibration functions).

It's also worth checking if the device is overheating. At high CPU temperature, the screen can behave unstable, turning on and off, which often happens during games or using the navigator.

Application Notifications and System Processes

Sometimes we think the screen is on its own, but it's actually a reaction to an incoming notification that disappears faster than we can look at the phone. Messengers, email clients, or news aggregators can wake the display even when the notifications are turned off in some scenarios.

Xiaomi has a Notification Indicator or Notification Blink feature that can briefly activate a screen or LED, and some apps have permission to work in the background and can run processes that require interaction with the user of the “oil”, which causes the awakening.

To identify the culprit, follow the following steps:

• 🔍 Check the notification log: swipe the curtain down immediately after the screen is turned on.
• ⚙️ Go to Settings. → Notifications and status bar → Centre for control.
• 📉 Sort apps by battery consumption – suspicious activity in the background often correlates with screen wakes.
• 🚫 Turn off Screen Enablement for specific apps in their notification settings.

Dynamic widgets (weather, currency rates, news) can be updated and briefly activate the display if the system has a power management failure.

Hardware malfunctions and plumes

If the software methods didn't help, and the screen continues to light up chaotically, there's a high probability of hardware failure: In Xiaomi and Redmi smartphones, the display plume or the plug of the power button can move away or oxidize, which leads to a closure of contacts, which the system perceives as the pressing of the power button.

A common cause is moisture. Even if the phone hasn't sunk, high room humidity or condensation can cause a short circuit in the screen control circuit, in which case the display can turn on, fade, flicker or completely stop responding to touch.

The main signs of hardware problems:

It is important to understand that self-repair without experience can damage other components, and if you are not confident in your abilities, it is better to contact an authorized service center.

💡

If the phone fell or came into contact with water, the software settings are unlikely to help - you need to diagnose the hardware part.

Resetting and system update

The latest software method to fix the problem is to update the system or reset completely. Mistakes in the MIUI code can cause cyclical reboots of services responsible for the display. Xiaomi regularly releases patches that fix such bugs.

Before resetting, make sure to back up your data. Resetting to factory settings will delete all applications and files, returning the phone to the "out of the box" state, which will help eliminate the impact of third-party software or modified system files.

Algorithm of actions before reset:

Don't install all the apps after you reset. Watch the clean system. If the screen stops lighting up on its own, it means that the problem was in one of the installed applications or settings conflict. If the problem is left even on the clean system, it's almost guaranteed hardware.

Also check for updates: Settings → About Phone → MIUI version. Sometimes the problem is known to developers and has already been fixed in the new firmware version.

Frequently Asked Questions (FAQ)