Xiaomi smartphone owners often face a situation where the Camera app stops displaying correctly on the screen or does not start at all. A request for how to “turn on the camera xiaomi 2 as it is small” most often indicates a visual interface failure when the viewfinder is compressed to a minimum size, or a problem with access to the device when the system blocks the launch of the module.
The problem may be accumulated debris, conflict versions of MIUI or third-party applications trying to access the lens. Sometimes the user accidentally activates zoom or picture-in-picture modes, which leads to a smaller workspace. It is important not to panic or rush to carry the gadget into the service, as in most cases the failure is fixed by software methods.
In this article, we will discuss in detail the algorithms that will help you return full functionality of shooting. You will learn how to clean hidden cache files, check the permissions in the security menu and restore factory parameters of the module. If your screen shows a “small” camera or the application does not respond to presses, the following sections contain a step-by-step guide to troubleshoot.
Diagnostics of visual failures and interface freezes
The first thing to do when you find anomalies in your lens is to make a primary diagnosis. If you see the preview window getting too small or biased, it may be the result of a floating window or a graphics shell system bug. Some versions of HyperOS firmware or older MIUIs have a rendering error where the application cannot correctly determine the screen resolution after exiting another heavy application.
Often, the cause of a "small" camera is an activated zoom mode that the user could have turned on accidentally. Check if the zoom is at the minimum value, and try to switch between shooting modes (for example, from "Photo" to "Video" and back), this action causes the system to redraw the interface and can return the viewfinder to normal dimensions.
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Before you start a complex manipulation, just restart the device, which solves the problem of the camera's suspended graphical interface in 60 percent of cases.
If visual distortion is accompanied by sound signals or vibration without opening the application, then the camera process is running in the background, but can not access the hardware. This often happens when another application (for example, a messenger or a scanner) is used. QR-Close all running programs through the multitasking menu and try to run the regular application again. Make sure that the display does not have any greasy spots or moisture at the top where the sensors are located, as this can affect the performance of the sensors.
Checking the MIUI security permissions and settings
Xiaomi’s security system is known for its strict control over access to sensitive modules. If the camera doesn’t turn on or isn’t working properly, it may have been revoked, often after a system update or installing “optimizers” from third-party sources, you need to manually check if the Camera app is allowed to use the appropriate hardware.
To do this, go to Settings → Apps → All Apps. Search the Camera list and click on Application Resolution. Make sure the switches opposite Camera, Microphone and Memory are activated. Newer versions of the shell also check the Other Permits section, which may hide a ban on Autostart or Display on Other Windows, which is critical for the viewfinder to work properly.
☑️ Access rights verification
Special attention should be paid to the system application "Security", inside it there is a section "Resolutions", which duplicates and extends the standard settings of Android. Go to Security → Permissions → Camera and make sure that the desired application is on the list of allowed. If there is a ban, the system will block the launch of the module, even if the basic settings are all on, which is a common reason why the camera is "small" or inactive - it is simply locked at the level of the system antivirus.
Sometimes the problem is with settings for Special Features. Go to Settings → Advanced Settings → Special Features (or “Special Features”). Check the “Outstart,” “Run in the background” and “Mapping on top of other apps” sections. Make sure that these features are allowed for the camera. Blocking background activity can cause the application to fail to initialize the module at launch, giving a black screen or a reduced preview.
Clearing the cache and resetting the camera app data
Temporary file accumulation is one of the most common causes of any Android app’s instability, and the camera is no exception. If you’ve been shooting high-resolution videos for a long time or using high-detail modes, broken pieces of data could be stored in the cache that now prevent you from running correctly. Clearing that data won’t delete your photos, but will return the app’s settings to “as after installation.”
Follow these steps: Go to Settings → Apps → All Apps → Camera. Select Clean (or Storage) and then click Clear Cache. If that doesn't work, try pressing Clear All (or Reset) and then the system will request confirmation — agree. The next time you start, the camera may be a little slower, as it will need to recreate the necessary configuration files.
What happens when you clean up the data?
After the data reset, it is recommended to force the application to stop before restarting. In the same application settings menu, click the Stop (or Close) button. This is guaranteed to complete all the background processes associated with the camera and allow it to start from scratch. If the problem was in a software conflict within the process, this method should help.
Importantly, data cleanup also resets resolution and aspect ratio settings. If you previously set 4:3 or 16:9, you now have to re-select them. Also check if the camera's power saving mode, which could have turned on by default after reset, has been activated, in some cases leading to lower preview quality and visually smaller workspace.
Conflicts with third-party applications and the developer mode
Third-party applications that use the camera (Instagram, Snapchat, TikTok, QR scanners) can conflict with the standard software. If an application is “hang” with access to the lens, the system camera will not be able to start or will work in limited mode. Often users forget that they left a video call in the background, and wonder why the camera shows a black screen or a strange interface.
Check which apps have access to the camera right now. In some versions of MIUI, a green indicator (dot) appears in the corner of the screen when the camera is active. If you see this point but didn't start the camera, then the access is using another application. Go to Settings → Privacy → Permissions Manager → Camera and see which apps have used the camera recently. Turn off access for suspicious or unnecessary programs.
Special attention should be paid to the settings "For developers." If you previously turned on the developer mode and changed the parameters of animation or zoom interface, this may have affected the display of the camera. → Advanced settings → For developers, find the sections related to Hardware Acceleration or Drawing. Try turning off the option to Disable Overlay. HW» (Disable HW overlays), if it is active, or conversely, to enable it to check the result.
Also on the developer menu is the item "Do not turn off the screen when charging." Although it is not directly related to the camera, its activation in combination with other bugs can lead to improper display behavior when running heavy applications. If you do not use debugging functions, it is better to turn off the developer mode completely, moving the main switch at the top of the menu to the "Off" position.
Hardware problems and checking the camera module
If software methods haven't worked, consider the possibility of a physical malfunction, and the phrase "the camera is small" can be a metaphor for describing a matrix or plume defect when an image appears, but it's heavily distorted, has artifacts, or only occupies a portion of the screen, often after falls, moisture, or simply because the plume is off the board.
You can check the status of the module using the engineering menu. Enter the code ##6484## (or #64663## for some models) in the "ringer" code. The CIT menu will open. You can find the "Camera" or "Front Camera" test in the list. Run the test: if you see a clear image on the whole screen, everything is fine with the hardware, and the problem is exactly in the software. If the image is rippled, has stripes, colored spots or is missing, repair is required.
| Symptoms. | Probable cause | Method of decision |
|---|---|---|
| Black screen at launch | Resource occupied by another application | Close all background processes, reboot |
| Little window preview | Interface bug or picture-in-picture mode | Clear the application cache, check permissions |
| Blurred or distorted photo | Dirt on the lens or damage to the plume | Wipe the lens, check in the engineering menu |
| Error: “I couldn’t connect to the camera” | Critical driver failure or plume departure | Reset to factory settings or replace module |
Carefully inspect the lens for dust, pile or cracks. Even a microscopic crack on the protective glass can give the effect of a soap image or glare that the user perceives as improper work. If the phone recently fell, the plume connector inside the case may have moved away, in which case a slight tap on the back cover (without fanaticism) sometimes temporarily restores contact, confirming a hardware problem.
⚠️ Attention: If the camera is working normally in the engineering test and not normally, do not disassemble the phone yourself. You may lose your warranty. The problem is the software, not the physical module.
Radical measures: resetting and updating the system
When all methods are exhausted, there are two options: a firmware update or a full reset. System updates often contain security patches and bug fixes for specific camera models. Go to Settings → About Phone and click on the MIUI version. If an update is available, download and install it. This can overwrite the damaged system libraries responsible for the camera.
If the update is unavailable or doesn't work, you'll have to reset to factory settings. This will delete all the data from the phone, so make sure to back up. Go to Settings → Phone → Settings → Reset all the data. Once reset, the phone will be like new. If a clean phone with no third-party apps installed, the camera is working fine, then the conflict created one of your apps.
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Hard Reset eliminates 99% of software errors, but requires a mandatory backup before the procedure begins.
If the camera is strange after the reset (small, black, with errors), there is a high probability of deep damage to the file system or failure of the module itself. In this situation, the software methods are powerless. You will need to flash the phone through the computer using the Mi Flash Tool utility, which is a complex procedure, or contact an authorized service center.
Sometimes it helps to roll back on the previous firmware version if the problem appeared immediately after the update. However, on modern Xiaomi smartphones, this is difficult to do because of the bootloader lock and the downgrade ban. So if fresh firmware did not help, and the reset did, the only way is to diagnose the service.