Xiaomi and Redmi smartphone owners often experience a device screen that goes off too quickly or the phone goes to sleep at the most inopportune moment, which can occur while reading articles, browsing recipes in the kitchen, or learning long instructions. Understanding how to manage these settings is key to keeping the gadget comfortable in your everyday life.
The MIUI system that is installed on the brand’s devices has many power-saving features. Sometimes aggressive optimization causes the screen to turn off after just a few seconds of inactivity. The user needs to distinguish between automatic screen shutdown, sleep timer and special modes like “Do not disturb” to effectively adjust the device to suit their needs.
In this article, we will take a closer look at all the possible causes of the phone’s quiescent state, where the hidden settings of the timer are, how to set the alarm clock so that it wakes you up rather than wakes the whole house, and what nuances new versions of the Android operating system have.
Differences between screen timer and system sleep
Before making configuration changes, it is important to clearly understand the difference between a display shutdown timer and a system sleep mode. Screen timer is the length of time a display remains active after the last touch. System sleep is a state where the processor enters low power mode, background processes may be limited and internet connections severed.
People often confuse these concepts by trying to turn one off through settings on the other. If your goal is to keep the screen from going out while reading, you need the first option. If the phone stops receiving notifications or the alarm doesn't ring, the problem lies deeper, in the system's power saving constraints.
Xiaomi has these settings spread across menus, which sometimes causes confusion. Good management of both settings allows you to find a balance between autonomy and usability. You should not completely turn off the system's sleep, as this will lead to a rapid discharge of the battery and possible overheating of the case.
⚠️ Warning: Completely turning off the screen timer (setting the value "Never") can cause the matrix to burn out on the screen. AMOLED-screens and a significant reduction in battery life.
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To read the text, it is better to use a special mode "Second Space" or applications-readers, which themselves control the brightness and time of the screen, without requiring global changes in the system.
Setting the display shutdown timer
The most common scenario is to increase the time it takes for the screen to go out. The MIUI shell is not deeply hidden, but the path to it may vary depending on the firmware version (Chinese or global).
You have to go to the Settings menu, then select Screen and brightness, and here you will find the Sleep Mode or Screen Time Out option. You click on it, and you will select the interval from 15 seconds to 10 minutes. The choice of Never is not available on all models without the use of special codes or engineering menus.
If the standard list isn't enough, you can search by settings, type the word "sleep" or "screen" into the search box, and the system will suggest the desired item, this is especially true for new versions of MIUI 13 and MIUI 14, where the menu structure often changes.
☑️ Checking screen settings
It is worth noting that in some models with AMOLED-The maximum time is limited to two minutes for the sake of security of the panel. This is a hardware limitation, and it is impossible to get around it with standard means. Attempts to use third-party applications to change this parameter can lead to unstable operation of the interface.
Use of Do Not Disturb Mode and Schedules
Often, by "sleep mode," users mean blocking calls and notifications at night. In Xiaomi smartphones, the function is Do Not Disturb. It allows you to set a schedule that will automatically go into quiet mode, ignoring incoming calls and messages.
To turn off or configure this mode, go to Settings → Sound and vibration → Do not disturb. You can see active schedules here. If the phone is silent at night, although you are waiting for an important call, check if the Schedule Switch is on. You can delete the existing schedule or change the time of its operation.
An important nuance is setting exceptions. Even if the mode is active, you can allow calls from favorite contacts or re-calls (if the same number rings a second time within 3 minutes), a critical feature for those waiting for emergency messages.
| Parameter | Description of function | Recommended value |
|---|---|---|
| Silence. | Total shutdown of sound | Included (night) |
| Repeated calls | Call on second set | Included. |
| Alarm clocks | The alarm clocks work in silence | Always on. |
| Calendar events | Meet-up reminders | If you wish, |
Remember that visual notifications (flicking of the indicator or screen) can also be turned off in this section.If you want your phone to sleep "deafly", make sure that all relevant ticks are removed.
Setting the alarm clock and its relationship to sleep
One of the most common queries is how to make the alarm ring even if the phone is asleep or off. On modern Xiaomi smartphones, the alarm clock works at the system level and should be triggered even when the screen is off. However, if the phone is completely off (the shutdown process is completed), the alarm may not work on some models.
You can find alarm settings in the Watch app. Open the app, click three dots in the corner or the menu button, select Settings. Here, you need to check the option "Alarm clock rings even if the phone is off." If you have an alarm and activate it, the phone will automatically turn on a minute before the bell.
Also worth paying attention to is the volume of the alarm clock. In MIUI, there is a separate volume slider for the alarm clock that is not media-related or ringing. Make sure it's not set to zero. Sometimes users accidentally reset it when switching sound profiles.
⚠️ Note: If you use third-party alarm apps from Google Play, the system can "kill" them in the background to save energy.
For guaranteed wake-up, it is recommended not to rely only on software settings. If the phone is old or the battery is worn out, it is better to leave the device on charge in sleep mode, rather than turning it off completely.
Why doesn't the alarm go off?
Special opportunities and reading mode
Android and MIUI have special features that can mimic or interfere with sleep patterns, such as Digital Well-being, which can force black and white mode and limit phone use at a given time.
You can check these settings along the Settings path. → Digital well-being → Sleep mode (or "Going to bed time"). This is where you set up a schedule where the screen turns black.-white, And the notifications are hidden. To turn that off, just deactivate the switch or delete the schedule.
There is also a read mode that makes the screen look like an e-book (E-ink) that can turn on automatically on a schedule or when certain apps are running. If the colors on the screen become unnatural, check the settings in the Screen and brightness section. → Reading mode.
Disabling these features returns the phone to standard behavior, which is especially important for users who use their smartphone to work at night and need full access to color reproduction and notifications.
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Digital Wellbeing Mode is a powerful control tool that often turns on automatically when you first set up your phone, but it’s easy to turn off in your system settings.
Problems with energy saving and background processes
Aggressive energy saving is a scourge of modern Xiaomi smartphones, which can force applications to close or shut down the network when the screen goes out, believing that the user does not need these resources, often perceived as a “deep sleep” from which the phone does not want to go out.
To prevent this, you need to configure exceptions for important applications. Go to Settings → Battery → Settings (or gear icon) → Energy saving applications. Find the desired application (for example, messenger or navigator) and select the option No restrictions.
Also check if ultra-power saving mode is on (the battery icon in the notification curtain), in which the phone turns into a "bell ringer", turning off everything superfluous, including background synchronization and a bright screen, which can be turned off by pressing the appropriate button in the curtain or in the battery settings.
- 🔋 No restrictions – allows the application to run in the background without power restrictions.
- 🔋 Smart mode – the system decides when to restrict the application (standard setting).
- 🔋 Hard limit – the application will not work in the background at all.
The right settings are critical to the stable operation of messengers and email clients, without which the phone can “fall asleep” so tightly that it will stop receiving messages until unlocked.