Why the debugging doesn't work USB Xiaomi: full analysis of causes and solutions

You connected Xiaomi to your computer, enabled debugging USB in the developer settings, but the device is still not defined in ADB? Or does the debugging resolution option not appear on the smartphone screen at all? This problem is familiar to many owners of Redmi, Poco and Black Shark - especially after updates MIUI or reset.

In 80% of cases, the debugging is not due to a phone breakdown, but to software restrictions that Xiaomi is actively implementing in the latest firmware versions. MIUI 12 there was a binding debugging to a specific PC through encryption RSA-keys, and in MIUI 14+ There are also validation checks for drivers, but there are more common reasons, from the lack of drivers to the wrong connection mode.

In this article, we will discuss all possible reasons why debugging is a good idea. USB It might not work on Xiaomi, from the obvious to the hidden, and it might also give you step-by-step instructions for every situation, including when the phone doesn't respond to your PC connection at all. If you have tried standard methods (on/off debugging, reboot the device) and they have not helped – here you will find solutions for deep problems.

Verification of the basic conditions: what should be included

Before digging deep, make sure the minimum requirements for debugging work are met. USB. Often, users skip these steps, spending hours searching for complex solutions.

On the smartphone side, Xiaomi should be activated:

🔧 Developer Mode: Go to Settings → The phone. → Version. MIUI And tap it 7 times on this item, and you'll get a notification saying, "You're a developer».
🔌 Debugging by USB: Now in Settings → Additionally. → For developers, find the item “Debugging by” USB» and turn it on.
🔒 Unlocking OEM (For some operations: this item is also on the developer menu. Without it, you can't unlock the bootloader or sew custom recovery.

On the computer side:

🖥️ Drivers installed ADB (for example, Minimal ADB and Fastboot or the full Android package SDK).
🔌 Used by the original USB-cable (cheap cables often do not support data transfer, only charging).
🔄 Windows Device Manager does not have exclamation points next to Android Device or ADB Interface.

Developer mode is on|Debugging by USB activated in settings|Drivers installed ADB PC-only|Quality is used USB-cable|Port port USB PC is working (check on another device)-->

If at least one of these points is not met, the debugging is guaranteed to not work. For example, on Xiaomi 13 Pro with the help of the new model. MIUI 14 in the absence of unlocking OEM Even standard adb device commands will return a blank list, although cable and drivers are fine.

2.Driver problems: why Windows doesn't see Xiaomi

One of the most common reasons is that drivers are not installed or not installed correctly, even if you have installed them. ADB, Xiaomi may not recognize a specific model due to lack of digital signature.

How to check:

Connect your phone to your PC and open Device Manager (Win + X → Device Manager).
Look at Portables or Other Devices, and if you have Xiaomi with a yellow triangle, the driver is not installed.
Right-click on the device and select Update the driver → Perform a search on this computer → Select from the list.
Manually specify the Android driver ADB Interface (it should be in the folder with the ADB, for example, C:\platform-tools).

If standard drivers do not fit, download the official Xiaomi website for your model:

🌐 For Redmi Note 12: Download page MIUI (Choose a model → download USB Driver).
🔧 For older models (e.g. Redmi) 4X) You may need a Qualcomm driver. HS-USB QDLoader 9008.

Important: Windows 11 sometimes blocks the installation of unsigned drivers. To get around this, before installing the driver:

Press Shift and restart your PC to Diagnostic Mode (via Settings) → Update and security → Recovery).
Select Loading Options → Reboot and press. F7 to disable the driver signature verification.

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If Xiaomi drivers are not determined after installing, try connecting the phone to another one. USB-port (preferably) USB 2.0 - they're more reliable for ADB).

3. MIUI Blocks debugging: hidden firmware restrictions

Xiaomi is actively implementing security mechanisms that can block debugging USB Even with the right settings, here are the basic pitfalls»:

Problem.	Reason.	Decision
The debugging is included, but through 1-2 minutes off	V MIUI 12+ Automatic locking is added when inactivity is inactive	Disable the Locking in case of inaction in the developer settings
No request for debugging permission appears	The device is already authorized on this PC, but the key has reset	Delete the adbkey.pub file in the folder %USERPROFILE%\.Android and reconnect the phone
ADB sees the device as unauthorized	Dropped. RSA-keys MIUI	Perform an adb kill-server, then an adb start-server and reconnect the phone.
Debugging only works in File Manager mode	V MIUI 14 is on by default MTP-a regime that conflicts with ADB	Switch the connection mode to Charge Only or Data Transfer (without a charge) MTP)

Problems are often encountered after the update. MIUI. For example, on Poco. F5 s MIUI 14.0.6 users are faced with the fact that debugging works only when connected via USB 2.0, and USB 3.0 gives a device not found error, due to a change in the data protocol in new firmware versions.

Another nuance: if you previously unlocked the bootloader through the Mi Unlock Tool, some debugging features may be limited, such as on unlocked devices, Xiaomi blocks access to fastboot oem commands to protect against unauthorized changes.

MIUI 12|MIUI 13|MIUI 14|MIUI 15 (HyperOS) |I don't know-->

4.Problems with USB-Cable and Ports: Physical Causes

If the settings and drivers are fine but the debugging still doesn't work, check the physical connection. Cheap cables, damaged ports, or faulty hubs can block data transmission, leaving only charging.

How to diagnose:

🔌 Try another cable: original Xiaomi cable or certified USB-C (Cheap cables often don't have all the necessary contacts to transmit data.
🖥️ Connect to another port: USB 3.0 (blue connectors) are sometimes in conflict with the MIUI. Try the standard one. USB 2.0 (black connector).
🔄 Check the port on your phone: connect the charger – if the phone is not charging or charging intermittently, the port may be damaged.
🔧 Use it. USB-External powered hub: Some laptops (especially MacBooks) don’t give out enough power for stable debugging.

Critical information: On Xiaomi 12T and newer when using cables without support USB 2.0 debugging USB It will not work smoothly or even turn on at all, even if the cable supports charging. USB In the new Snapdragon 8 processors+ Gen 1.

If you suspect port problems on your phone, try brushing it gently with a toothpick (not a metal object!) or blowing it with compressed air. Dust and contact oxidation are a common cause of unstable connections.

How to check the cable for data transmission support?

Connect your phone to your PC and select File Transfer Mode (MTP). If the computer sees the phone as a removable disk, the cable supports data transmission, and if it charges, the cable is charging and not debugging.

5. Conflicts with antiviruses and firewall

Antiviruses and built-in Windows firewall can block ADB, This is especially true for Kaspersky, Avast and Bitdefender, which aggressively filter network activity.

What to do:

Temporarily disable the antivirus and check if the debugging has worked.
Add adb.exe and fastboot.exe files to the antivirus exceptions.
In Windows Firewall, allow incoming/outgoing connections for adb.exe:

1. Open Control Panel → Windows Firewall → Additional settings.


2. Go to the Outbound Connection Rules → New Rule.




3. Select For Program and specify the path to adb.exe (e.g., C:\platform-tools\adb.exe).




4. Allow connection and apply the rule to all types of networks.

On macOS or Linux, similar problems can occur due to ufw (Uncomplicated Firewall). ADB, execute:

sudo ufw allow 5037/tcp # ADB port by default


sudo ufw reload

If you use the Mi Flash Tool for firmware, antivirus can block it, too, in which case add the entire folder with the utility to the exceptions (for example, add the entire folder with the utility, C:\MiFlash).

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Antiviruses are often blocked ADB Because of its use in exploits (e.g., root) If debugging is needed for legitimate purposes (development, firmware), be sure to set exceptions.

6. Specific problems on different Xiaomi models

Some Xiaomi models have unique bugs with debugging USB. Here are the most frequent cases:

Redmi Note 10 / 11 / 12 series

On these devices after updating to MIUI 13/14 The system may not work due to conflict with MTP-The regime:

Connect the phone to the PC.
In the notification curtain, select Only Charging (not File Transfer!).
Start adb devices – the device must be determined.

Poco F3 / F4 / F5

In these models, debugging can be disabled after rebooting due to a bug in the kernel.

adb shell settings put global stay_on_while_plugged_in 3

This command disables the automatic screen shutdown when connected to the PC, which prevents the connection from resetting.

Xiaomi 13 / 14 (HyperOS)

In HyperOS (based on) MIUI 15) added debugging binding to Mi Account. If you are not logged in or your account is not confirmed, debugging will be disabled after 5 minutes:

Sign in to Mi Account on your phone.
Confirm your account via SMS or email.
In the developer settings, enable Allow debugging when the bootloader is unlocked (if the bootloader is unlocked).

Black Shark 4 / 5

On gaming smartphones Black Shark debugging USB It might not work because of the performance mode:

Go to Settings. → Special facilities → Black Shark mode.
Turn off acceleration. USB.
Reboot the phone.

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If your model is not listed above, try resetting the network settings: → SIM-maps and mobile networks → Resetting the network settings. This sometimes helps with problems with the network. USB-A modem that conflicts with ADB.

Alternative methods of connection: if USB doesn't work

If debugging is on USB It does not work (for example, due to a damaged port), alternative methods can be used:

📶 Wi-Fi debugging (ADB over Wi-Fi)

Suitable for most Xiaomi models with Android 11+:

Connect your phone to the PC by USB and do it:

adb tcpip 5555

Turn off the cable and connect via Wi-Fi:

adb connect [IP- phone address]:5555

To find out IP-Phone address, go to Settings → The phone. → General information → Status → IP-address.

🔄 Wireless debugging (Android 11)+)

V MIUI 12.5+ There is a built-in wireless debugging function:

Go to Settings. → For developers → Wireless debugging.
Click Connect the device and scan. QR-PC screen code (you need to use Android Studio or ADB Wi-Fi Connect).

⚡ Debugging through OTG (power-user)

If USB-port on the phone is serviceable, but the connection to the PC does not work, you can try to connect through OTG-hub:

Buy it. OTG-port USB-A ethernet.
Connect your phone to the hub and the hub to your PC via Ethernet (you need an adapter). USB-RJ45).
Set up. ADB over the network as described above.

These methods are less stable than USB, But can help in critical situations (for example, when a damaged connector).

8.Extreme measures: resetting and flashing

If nothing works, radical methods remain. Warning: they will lead to data loss!

Reset to factory settings:

Go to Settings → About the phone → Reset settings.
Choose to erase all data.
After restarting, re-enable the developer mode and debugging by USB.

Fastboot flashing (if debugging is needed to unlock):

Download the official firmware for your model from the Xiaomi website.
Unpack the archive and run from the firmware folder:

fastboot flash all

⚠️ Warning: This method deletes all data and resets settings. Use it only if other methods have failed and you have a backup.

If even after flashing the debugging does not work, hardware problems are possible (the controller is damaged). USB If you have a mother's fee, please contact the service center.

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Resetting or flashing should be the last step. 90% of the time, the problem is solved software-check drivers, cables, and settings again. MIUI.

FAQ: Frequent questions about debugging on Xiaomi

🔍 Why is it that when you connect to a PC, the phone charges, but is not determined by the ADB?

This is a typical problem of a faulty cable or a lack of drivers. Try: Use the original Xiaomi cable. Install drivers manually through Device Manager. Switch the connection mode on the phone from the device. MTP If it doesn't work, check the port. USB PCs (especially laptops, where ports often fail).

🔐 How to Reset Authorization ADB, If the phone does not request permission?

Delete the key file on the PC: Close all windows ADB. Delete the adbkey.pub file in the folder %USERPROFILE%\.android (on Windows) or ~/.android Linux/Mac). Follow the commands: adb kill-server adb start-server After that, reconnect the phone - a request for debugging permission should appear.

📱 Why Debugging Works on One PC but Doesn't Work on Another?

It's tied to the binding. RSA-key MIUI. Each new PC requires a separate confirmation. Solutions: On your phone, in the developer's settings, find Revoke Debugging Permits and reset them. On the second PC, delete the old keys (adbkey.pub) and reconnect the phone. If you use them, Linux/Mac, check the file rights ~/.android (chmod 755 ~/.android).

🔄 What to do if the debugging is turned on, but after a minute it turns off?

V MIUI 12+ Added the automatic debugging function when you're inactive. To turn it off: Go to Settings → For developers, find the item "Disable debugging when inactive" and turn it off. Also check if the battery optimizer blocks debugging (in the battery settings add the ADB excepted).

🛠️ Can I turn on debugging if the smartphone screen is broken?

Yeah, but it's complicated: 🔧 If previously the debugging was included USB, Connect your phone to your PC and use adb commands to control (e.g., adb shell input tap x y for tap emulation). 📶 If Wi-Fi is on and ADB over Network, connect wirelessly (you need to know) IP-phone). 🔄 If nothing helps, just flash it through Fastboot (but it will delete all data). ⚠️ Warning: Without debugging enabled or unlocked bootloader, it is almost impossible to restore access to the broken screen.