Owners of Xiaomi, Redmi and Poco smartphones often face a situation where the camera app suddenly stops launching or gives out a black screen when trying to switch to the front module. This is a common problem that can be caused both by a software failure in the shell of MIUI or HyperOS, and physical damage to the device. In most cases, you can restore the selfie camera to work on your own without contacting the service center, if you act consistently.
The main reason is a conflict of processes, when one application blocks access to the video stream, or in the damage of system files after a failed update. Software error is the most common culprit, especially if the phone fell or was exposed to moisture. Ignoring the problem can lead to the fact that the module will cease to be determined by the system completely, so it is important to perform diagnostics immediately after the fault is detected.
In this article, we will look at all the steps of troubleshooting, from simple reboots to complex manipulations of the engineering menu. You will learn how to distinguish software glitch from hardware breakdown and what steps to take to return functionality. The access statistics show that 70% of the time the problem is solved by cleaning the cache or turning off hardware acceleration. Let's start with basic checks that do not require special skills.
Primary Diagnostics and Program Conflicts
Before you panic and carry the device for repair, you need to eliminate elementary software failures. Often background processes or malfunctioning applications block access to the camera. First of all, perform a full reboot of the smartphone, not just turn off the screen. This will clear RAM and complete the hanging processes that could take control of the module.
If the reboot didn't work, check if you have another app running that uses the camera. Telegram, WhatsApp, or Skype video calls can block access to the module for a regular app. Close all background apps through the task menu. You should also pay attention to recently installed programs, especially those that request access to photos and videos.
- 📱 Restart the device by holding the power button for 10 seconds.
- 🚫 Close all applications using the camera through Task Manager.
- 🔍 Check the list of recently installed apps for suspicious permissions.
- 🛡️ Make sure that the antivirus or ad blocker does not block access to the module.
It is important to check whether Do Not Disturb mode or special restrictions for applications in battery settings are enabled. MIUI aggressively optimizes power consumption and can kill camera processes. Go to the battery settings and make sure that the Camera app has a "No Limits" restriction, which will prevent the video capture service from being forced to stop.
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If the camera is running in safe mode, it's a third-party app that's causing the problem.
Application settings and data cleanup
The most effective way to fix software bugs is to reset the camera app itself, which will not delete your photos and videos in the gallery, but will return the shooting parameters to factory values. Often users change the resolution or aspect ratio, which causes conflict with the module driver.
To do the reset, go to the phone's settings menu, find the Apps section, and select All Apps. From the list, find the standard Camera app. Inside the app menu, click on Clear and select Clear All or Clear Data. After that, try to start the camera again.
Settings → Applications → All Apps → Camera → Clean → Clean EverythingIf the standard method didn’t work, you can try to force the app to stop before cleaning it. Click the Stop button in the same app properties menu. This is guaranteed to complete all related processes. It’s also worth checking for updates to the camera app through the Google Play store or GetApps, as older versions may not be compatible with the current version of Android.
☑️ Application reset algorithm
Pay attention to the permissions given to the app. Go to Application Permissions and make sure that you have access to the camera, microphone and memory. Sometimes, after you update the system, the privacy settings are reset and the application loses the right to use the hardware. Without the appropriate permissions, the module simply won't start.
Diagnostics through CIT Engineering Menu
Xiaomi smartphones have a built-in CIT (Customer Interactive Test) diagnostic tool that allows you to check the health of all hardware components, including the front camera, regardless of how the operating system works.
To enter the menu, dial the special code ##6484## in the Phone app. If the code does not work, go to the settings: Settings → About Phone → Version of the kernel (click quickly several times). In the menu that opens, find FrontCamera or Front Camera.
| CIT menu item | Description of the test | Successful outcome | The error |
|---|---|---|---|
| FrontCamera | Checking the front camera | Camera image emerges | Black screen or error |
| RearCamera | Checking the main camera | Clear image | Blurring or failure |
| Flashlight | Flash check | The flare is on fire. | No reaction. |
| Proximity | Approximation sensor | Value changes at closing | The meaning doesn't change. |
⚠️ Attention: If on the menu CIT The front camera is also not working (black screen), with a 90% probability of the problem is hardware in nature.
The testing menu also allows you to check the proximity sensor, which is often associated with the logic of switching cameras during calls. If the sensor is stuck, the system can think that the phone is near the ear, and lock the screen or camera.
What to do if the CIT code does not work?
System update and firmware rollback
Cameras are often unstable after an operating system update. New versions of Android or MIUI shells may contain driver bugs. Check for available updates in Settings → About Phone. Sometimes Xiaomi releases patches that fix exactly the camera issues.
If the problem appears immediately after the update, you may want to consider rolling back on the previous firmware or flashing the device. However, this is a complex procedure that requires unlocking the bootloader. Before any firmware manipulation, be sure to create a full backup of the data.
There is also the option to reset your network settings, which sometimes helps with video calling issues. Go to Settings → Connection & Sharing → Reset Wi-Fi, mobile networks and Bluetooth. This action will not affect your personal files, but will reset Wi-Fi passwords and Bluetooth settings.
- 🔄 Check for system updates in phone settings.
- 📉 Consider rolling back firmware if the problem appears after the update.
- 🌐 Reset network settings to exclude connection conflicts.
- 📲 Try installing a third-party camera app, such as Open Camera.
Installing an alternative app from Google Play, like Open Camera or Camera MX, will help you understand why. If a third-party app sees the camera and takes pictures, then the problem is in the software of Xiaomi’s regular camera. If third-party apps also give an error, it goes deeper.
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If third-party camera apps work and the regular one doesn’t, the problem is in the cache or bug of a particular version of the app, not in the hardware.
Hardware malfunctions and physical damage
When software is exhausted, you have to talk about hardware. The front camera in Xiaomi smartphones connects through a flexible plume that can eventually move away from contact. This often happens after falls, even if there is no external damage to the body.
Another common cause is oxidation of the contacts due to moisture. Even if the phone is not sinking, high humidity in the bathroom or rain can lead to microscopic condensation inside the case. Oxidation of the camera plume causes the module to cease to be detected by the system.
⚠️ Warning: Do not try to disassemble your phone yourself unless you have the experience and tools.You may damage other components or damage the tightness of the case, which will lead to loss of water protection.
If the phone has recently fallen, the matrix module or lens itself could be damaged, in which case the camera may buzz (try to focus) or simply remain silent, and it is also worth checking whether the lens is covered with a protective glass or case if you have recently changed the screen or body.
Use of third-party software and Root rights
For advanced users with Root rights, there are deep diagnostic tools such as the Camera2 API Probe, which will show you whether your device supports a full set of API features and whether access to the camera is blocked at the system level.
If you have installed modified firmware or patches (such as Magisk photo enhancement modules), they may conflict with the current version of the system. Try temporarily disabling all modules or returning stock firmware. Sometimes the problem lies in the incompatibility of HAL (Hardware Abstraction Layer) libraries.
adb shell dumpsys media.cameraThis team is in the console. ADB (Android Debug Bridge will display a detailed log of the status of the cameras. If you see the status of "Disconnected" or connection errors in the log ID front camera (usually 1), this confirms the loss of communication with the module.