Why the camera on Android freezes: a complete analysis of the reasons and solutions

Are you trying to take a photo, but the camera application freezes for secondsis showing black screen or not at all crashes with an error? The problem is familiar to millions of Android users - from budget Redmi to flagship Samsung Galaxy. In 80% of cases, it is not hardware failures that are to blame, but software failures that you can fix yourself.

In this article we will look into all possible reasons —from an overloaded cache to conflicts with the firmware, and we will also give unique solutions for specific models smartphonesthat you will not find in standard instructions. For example, why the camera Xiaomi Poco X3 freezes when shooting in 4K, but works stably in Full HD, or how to get around the "green screen" bug on some Realme after updating to Android 14.

Do not rush to take the phone to the service: in 95% of cases the problem is solved in 5–15 minutes without disassembling the device. Let's start with the simplest and move on to complex methods.

1. An overloaded camera cache is the main cause of lags

The most common culprit of freezes is clogged camera application cache. These temporary files accumulate after each shoot, especially if you frequently switch modes (portrait, night, 4K video). When the cache size exceeds 500–700 MB, the system begins to "slow down" when processing new data.

Symptoms:

• 📸 The camera opens, but freezes after 2-3 seconds after launch.
• 🖼️ When you try to take a picture, the message "Processing..." appears, which hangs forever.
• 🔄 Application closes spontaneously without error.

How to clear the cache correctly:

1. Open Settings → Applications → Camera.
2. Click Storage → Clear cache (NOT data!).
3. Reboot your smartphone.

⚠️ Attention: On some firmware (for example, ColorOS 13+) cleaning The camera cache resets custom shooting settings (white balance, exposure). Take screenshots of the current settings in the camera menu in advance.

2. Conflict with other applications (especially instant messengers)

Few people know, but the camera may freeze due to background processes other apps. Most often the culprits are:

• 📱 Messengers (WhatsApp, Telegram, Viber) - they constantly scan the camera for QR codes and stickers.
• 🎮 Games with access to the camera (PUBG Mobile, Genshin Impact - use it for streaming or AR effects).
• 🔍 Applications for scanning documents (CamScanner, Adobe Scan).

How to check and resolve the conflict:

1. Close all applications via Recent tasks (swipe up).
2. Open the camera - if it works stably, one of the background applications is to blame.
3. Launch the apps one by one and check the camera to figure out the “culprit”.

List of applications that most often conflict with the camera

Snapchat, TikTok, Facebook, Zoom, Google Meet, Bigo Live, Likee, Microsoft Lens.

For Samsung Galaxy (One UI) there is a separate bug: the camera freezes if it is running in the background Samsung Health. Solution - disable permission for this application to use the camera in Settings → Privacy → Permissions.

3. Failures in the firmware: when only resetting helps

If the camera freezes after updating Android or starts glitches for no apparent reason, the firmware is to blame. Especially relevant for smartphones:

• 📱 Xiaomi on MIUI 14+ (bug with "green screen" in night mode).
• 📱 Realme/OPPO on ColorOS 13/14 (the camera slows down at zoom >2x).
• 📱 Samsung Galaxy S22/S23 after updating to One UI 6.0.

First try reset the camera settings:

1. Open the application Camera.
2. Tap on ⚙️ Settings → Reset settings.
3. Reboot your phone.

If that doesn't help, do it soft system reset (does not delete files, but resets settings):

1. Go to Settings → System → Reset settings.
2. Select Reset all settings (NOT "Delete all data!").
3. Confirm the action.

⚠️ Attention: On some models Xiaomi (for example, Redmi Note 12), resetting the camera settings results in loss of autofocus calibration. After the procedure, check the clarity of the photo in macro mode - if necessary, recalibrate through the engineering menu (##36446337##).

4. Problems with the camera module: how to check for hardware failure

If software methods did not help, perhaps the camera module itself has failed.Typical symptoms of hardware failure:

• 📵 The camera shows black screen even after a reboot.
• 🔍 In the photo appear strips, spots or blurriness (matrix defect).
• 🔊 When switching between cameras you can hear grinding or clicking (problem with the zoom/autofocus motor).

How to check hardware serviceability:

1. Test through the engineering menu:

   Enter ##0*## or ##36446337## (depending on model).
   In the menu, select Camera Test —if the image is missing or distorted, the module is faulty.

2. Check on another device:

   Connect your smartphone to the PC and try using the camera via DroidCam or IP Webcam. If the image is not transmitted, the problem is in the hardware.

Symptom	Probable cause	Solution
Black screen in all applications	The camera cable is disconnected	Disassembling and checking contacts
Green/purple stripes in the photo	Damage to the matrix	Replacing the camera module
Autofocus does not work	Failure of the focusing motor	Replace the camera or repair the motor
The camera heats up and turns off	Short circuit in the module	Diagnostics in the service

On Samsung Galaxy A5x/A7x a common problem is detachment of the main camera cable due to overheating. If the phone has been dropped or overheated (for example, while charging), check the cable visually - it may be blackened or deformed.

5. Lack of RAM: why the camera lags on weak smartphones

On devices with 3–4 GB of RAM (for example, Redmi 9A, Samsung Galaxy M12), the camera can freezes due to lack of memory, especially when shooting video in 4K or using AR effects. The system kills background processes, but the camera still does not have enough resources.

How to free up RAM before shooting:

Close all background applications

Disable synchronization (Settings → Accounts)

Turn off animation (Settings → Accessibility → Remove animation)

Switch to power saving mode

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For Xiaomi there is a hidden function Advanced camera modethat limits the use of RAM:

1. Open the application Camera.
2. tap on Mode (where you select "Photo/Video").
3. In the menu that appears, select Easy mode.

⚠️ Attention: On some firmware MIUI enabling "Easy mode" disables 4K shooting and night mode. If you need these features, it is better to free up memory manually.

6. Viruses and malware: the hidden threat

Malware can block access to the camera or use it in the background (for example, for spying). Signs of infection:

• 🔴 Camera turns on by itself (shutter sound is heard).
• 📥 Unknown applications request access to the camera.
• 🔋 The phone quickly discharges even in standby mode.

How to check and remove viruses:

1. Install Malwarebytes or Kaspersky Mobile and scan system.
2. Check the list of applications with access to the camera in Settings → Privacy → Permissions → Camera.
3. Uninstall suspicious apps (especially with names like Camera Service, Flash Helper).

On Huawei and Honor viruses are often disguised as system applications (for example, HwCameraTo distinguish the original from the fake:

1. Long-press the application icon on the main screen.
2. Select Information about the application.
3. Check Developer —the original one will have Huawei Technologies Co., Ltd..

7. Features of specific models: unique bugs and fixes

Some smartphones have unique problems with the camera, which are not described in the standard instructions. We have collected the most common:

📱 Xiaomi Redmi Note 10/11 Pro:

• 🔴 Problem: The camera freezes when shooting video in 4K@60fps.
• 🔧 Solution: In the engineering menu (##4636##) disable Hardware Acceleration for the camera.

📱 Samsung Galaxy A52/A72:

• 🔴 Problem: Green tint in the photo when shooting indoors.
• 🔧 Solution: Disable Scene Optimizer in the camera settings.

📱 Realme 9 Pro+:

• 🔴 Problem: Black screen when switching to the front camera.
• 🔧 Solution: Install alternative camera software (GCam or Open Camera).

📱 POCO X3/X4 Pro:

• 🔴 Problem: The camera slows down after 5-10 minutes of shooting video.
• 🔧 Solution: In the developer settings (Settings → About phone → tap on "MIUI Version" 7 times) disable Limit background processes.

For Google Pixel (all model) there is a separate bug: the camera may freeze if Settings → System → Gestures is turned on (swipe on the ambient display). Disable this function - the problem will disappear. Skip songs (swipe on the ambient display). Disable this feature and the problem will disappear.

FAQ: Frequently asked questions about the camera freezing on Android

🔍 Why does the camera freeze only in some applications (for example, Instagram or Snapchat)?

This is due to optimizing applications for specific models. For example, Snapchat works poorly on smartphones with processors Mediatek Helio (for example, Redmi 9), because it uses its own image processing algorithms that conflict with camera drivers.

Solution:

1. Update the problematic application to the latest version.
2. Disable in the camera settings HDR processing (if available).
3. Use alternative applications (for example, Open Camera to take pictures, and then upload the photo to social networks).

📱 The camera freezes after falling phone. What to do?

Most likely, The cable or camera module is damaged. Even if the phone looks intact on the outside, the impact could have dislodged the contacts inside. Check: Is the cable or camera module damaged? Is it working? are

• Does it work? autofocus (point the camera at an object at a distance of 10 cm - if it does not focus, the problem is in the motor).
• Is there artifacts in the photo (stripes, spots, blurriness at the edges).
• Can you hear extraneous sounds when switching between cameras (grinding, crackling).

If at least one point is confirmed, take the phone to the service. Self-repair can aggravate the problem (for example, when replacing a cable, it is easy to damage the matrix).

⚙️ Can custom firmware (for example, LineageOS) cause the camera to freeze?

Yes, and this is one of the most common problems. Custom firmware often do not have optimized drivers for the camera, especially on smartphones with several modules (wide-angle, telephoto, macro).

What to do:

• Install GCam with a customized config for your model (search on the forum 4PDA).
• Check if there is an option in the firmware settings Camera HAL - try switching it to HAL3 or HAL1.
• If the camera does not work at all, return to stock firmware.

🔋 Why does the camera start to lag when the battery charge is low?

On most Android smartphones, when charging <15% the system automatically Limits performance cameras to save energy. This may manifest itself as:

• Freezes when shooting video.
• Autofocus failure.
• Appearance of the message "Insufficient energy for cameras".

Solution:

1. Connect your phone to charge (even if the battery level is 20–30%).
2. In the battery settings, disable Optimization for camera.
3. Use the mode energy saving Average (not Maximum).

🔄 The camera freezes after updating Android. How to roll back?

If the problem appeared after the update, you can try roll back to the previous firmware version. Instructions for popular brands:

For Xiaomi:

1. Download the old firmware version from official website.
2. Rename the file to update.zip and place it in the root of memory.
3. In Recovery, select Install update.zip.

For Samsung:

1. Install Odin on PC.
2. Download the stock firmware from samfw.com.
3. Connect the phone in mode Download Mode and flash the old version.

⚠️ Attention: Rolling back the firmware may lead to locking the bootloader on some models (for example, Samsung Galaxy S22+). Before the procedure, check the information about your model on thematic forums.