Modern smartphones, including the popular Xiaomi Redmi 9A, are equipped with advanced accelerometers and gyroscopes that automatically determine the position of the device in space. However, users often face a situation where the image on the display “froze” in the vertical orientation, ignoring the rotation of the gadget. This can cause serious discomfort when watching videos, reading books or playing in horizontal applications.
Owners of the Redmi line of budget models sometimes mistakenly believe that their device does not support automatic change of orientation due to the lack of an obvious switch in the notification curtain.In fact, the MIUI shell has its own features of managing system functions that differ from pure Android. Understanding the logic of the interface allows you to quickly activate the desired options without installing third-party software.
In this guide, we will take a look at all the ways to activate and fine-tune the screen rotation. You will learn how to use the hidden engineer menus to calibrate sensors if standard methods do not work. Also, we will discuss the frequent software failures typical of the version of MIUI 12 and newer installed on the Redmi 9A. Competent setting will ensure comfortable use of multimedia capabilities of your smartphone.
Standard methods of activating the autoturn in MIUI
The most obvious and quick way to control the display orientation on the Xiaomi Redmi 9A is to use the Control Center. Unlike older versions of Android, in modern MIUI shells, this element can be hidden or renamed. To access, you need to swipe down from the top right corner of the screen to open the notification bar and quick settings. If you don't see the desired icon, it may be hidden in the second page of the menu.
Click on an icon that usually looks like a circular-arrow lock or is simply labeled Autoturn. Activating this feature allows the system to respond to changes in the position of the case. It's important to note that some applications have their own orientation settings that can overlap system commands, for example, the video player can be set to forced portrait mode.
If a standard switch is missing, check the display settings. Go to Settings, then select Screen. There may be an optional Content Autoturn option that controls the behavior of the interface at the system level. The lack of a turn response is often due to the proximity sensor being closed by a protective glass or case, which confuses the calibration.
⚠️ Note: If the auto-turn slider in the curtain is active (lit), but the screen is not rotating, check if the "Orientation Lock" mode is enabled in the settings of the particular application you are currently using.
Configure via system menu and hot keys
The in-depth screen behavior setting is available through the main configuration menu of the system. To get there, open Settings and find the Additional Features or Special Features section. Depending on the Redmi 9A firmware version, the path may vary slightly. Here you can find advanced interface management options that are not displayed on the home screen.
Some versions of MIUI have a Screen Rotation feature that allows you to capture the orientation for all applications at once, which is useful if you use your smartphone as a navigator or digital photo frame. Position fixing prevents random image upheavals with sudden hand movements.
☑️ Checking screen settings
Also worth mentioning are hotkeys. On Xiaomi, you can set up a triple tap on the power button or back (if supported) to call certain actions. Although there is no direct command to turn the screen, you can set up an application that requires landscape mode, thereby forcibly changing orientation. This is a workaround, but it is effective in certain use cases.
Users who are used to other brands can search for the feature in the Notifications and Status bar section. Redmi's logic often groupes the display controls separately from the notification controls. If you can't find the switch, search by settings: type the word "turn" into the search bar at the top of the settings menu, and the system will suggest the desired shortcut.
Calibration of sensors and engineering menu
If the software switches don't help, the problem may be that the accelerometer is not working properly. - Xiaomi Redmi 9A There's a built-in engineering menu for testing and calibrating hardware components. To get into it, open the Phone app and dial the combination ##6484##. CIT-Menu (Customer Integration Test) for diagnostics.
In the test list, look for the Accelerometer or Gyroscope. You click on it and you see the current readings of the sensors. You need to calibrate your phone on a perfectly flat horizontal surface and press the Calibration button. It takes a few seconds. Once it's done successfully, the system will reset its default values, which often solves the problem of sticking the screen in one orientation.
| Parameter | Description | Normal value. |
|---|---|---|
| X-Axis | Left-right tilt | About 0 in a horizontal position |
| Y-Axis | Bending back and forth | About 0 in a horizontal position |
| Z-Axis | Vertical axis | About 9.8 or -9.8 (gravity) |
| Status | Calibration status | Pass / Success |
What to do if CIT-menu won't open?
After calibration, be sure to restart the device. Restart is necessary for the application of new sensor parameters by the operating system. If after calibration and reboot the problem persists, there may be physical damage to the accelerometer module, especially if the phone has previously been subjected to severe shocks.
Solving blocking problems in specific applications
A common reason for ignoring a turn is not a system failure, but the settings of the application itself. Many programs, especially social networks and instant messengers, are blocked vertically by default for easy one-handed control. The Xiaomi Redmi 9A does not have a global “unlock button” for all applications at once, but there are ways to get around this limitation.
There is a special feature in the Settings menu -> Additional Features -> Limitless Screen (or "Full Screen Mode"). Here you can force stretching and rotating for applications that are not optimized for the Redmi 9A screen format. Find the problem app on the list and activate the Full Screen Mode switch. This often causes the application to redraw in landscape mode.
- 📱 YouTube: has its own turn button inside the player, ignoring the system lock settings.
- 📷 Camera: Turns automatically, but the viewfinder can freeze if you swipe the app without turning off the camera.
- 🎮 Some lightweight games don’t have rotation sensors and only work in one mode, regardless of the phone’s settings.
- 📖 Books: Readers often require manual inclusion of landscape mode in the text display settings inside the program itself.
⚠️ Warning: Forced full-screen application launches can lead to incorrect display of the interface, for example, buttons can go beyond the edges of the screen or the text becomes too small.
It’s also worth checking out updates to the problematic app in the Google Play store or GetApps. Developers often release patches that fix orientation errors on specific smartphone models, such as the Redmi 9A with its 720x1600 resolution. An outdated version of the software may incorrectly determine the pixel density and block the turn.
Third-party orientation management applications
If MIUI is not enough, you can use third-party software from the Google Play repository. There are many tools that take over sensors and force the display to change orientation, and these applications are useful when system settings are locked or not working properly.
One popular solution is the Rotation Control app. Once installed, it adds its widget to the notification panel, which takes precedence over Xiaomi's system settings. You can set a hard fix in landscape mode, and the phone will ignore any attempts by apps to return portrait orientation. This is ideal for browsing the web in horizontal mode.
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Use orientation control apps with caution: they may consume extra battery power as they constantly poll position sensors in the background, ignoring system optimization.
Another option is to use macros or automation applications like MacroDroid, where you can create a script that says, "If X is running, turn on the autorotation," which allows you to flexibly adjust your smartphone behavior to different tasks without manually switching the toggles every time, but for beginners, this can seem difficult to implement.
When installing third-party software, pay attention to the permissions requested. To control the screen, the application will require permission to access usage data and permission to display over other windows. Without these rights, the program will not be able to intercept control of the display. Always download the software only from trusted sources to avoid the introduction of malicious code.
Diagnostics of hardware faults of the display
In rare cases, a screen rotation problem on the Redmi 9A indicates a physical malfunction.If the calibration in the engineering menu shows values close to zero even when the phone is tilted, or if the data change schedule twitches chaoticly, the accelerometer module is likely to have failed.This component is often integrated into a common board or is located next to the charging connector.
It's also worth looking at the case for signs of falling or getting moisture, and even a microscopic crack on the board can disrupt contact with the sensor. If the phone has recently been mechanically impacted and the problem with turning has occurred immediately after that, the probability of hardware failure is extremely high, and in this situation, software methods are powerless.
- 🔨 Strikes: could shift the sensor crystal inside the body.
- 💧 Moisture: oxidation of contacts leads to unstable operation of the gyroscope.
- 🔋 Battery bloating: In rare cases, a swollen battery presses on the board, disrupting sensors.
- 📱 Screen replacement: if the display was changed to a non-original one, the new module may not have a high-quality approach/rotation sensor.
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If the accelerometer test shows Fail status in the Engineering Menu (CIT), or the data does not change when the phone is rotating, a replacement of the hardware in the service center is required.
For final diagnosis, you can run deep testing through ADB (Android Debug Bridge) by connecting your phone to your computer. Adb shell dumpsys sensor commands allow you to see raw data from all sensors in real time. If the computer doesn't see changes in data as the device rotates, and calibration doesn't help, that confirms the need for repair.