Troubleshooting: 'su' Command Not Working in ADB Shell with KernelSU

KernelSU is a popular choice for granting root access on Android devices, but sometimes users encounter issues with the 'su' command in ADB shell. This guide will help you troubleshoot why 'su' might not be working in ADB shell when using KernelSU and offer solutions.

**Why 'su' Might Not Be Working**

There are a few common reasons why the 'su' command might fail in ADB shell even though root access is working fine in apps and modules:

* **Permissions Issues:** Make sure ADB itself has the necessary permissions to access root. Check your device's settings and ensure ADB has 'Root access' enabled.
* **Incorrect ADB Configuration:** Double-check your ADB setup. Ensure you're using the correct ADB binary and that your device is properly recognized.
* **KernelSU Configuration:** Verify your KernelSU settings within the Manager app. Pay attention to the 'LKM mode' setting and ensure it's configured correctly for your device and Android version.
* **Outdated KernelSU Version:** Using an outdated version of KernelSU could lead to compatibility issues. Update KernelSU to the latest stable release.
* **Conflicting Apps or Modules:** Other apps or modules that might be manipulating the root environment or providing alternative root access could interfere. Temporarily disable any third-party apps related to root access to see if that resolves the issue.

**Troubleshooting Steps**

1. **Restart Your Device:** A simple restart can often fix temporary glitches.
2. **Check ADB Permissions:** Go to your device's settings and verify that ADB has the required permissions to access the root filesystem.
3. **Reinstall KernelSU:** After backing up any important configurations, try reinstalling KernelSU to ensure a fresh installation.
4. **Update KernelSU:** Head to the official KernelSU website or repository and download the latest stable version.
5. **Check for Conflicts:** Temporarily disable any other root-related apps or modules and try again.

**Important Note:** If these steps don't resolve the issue, it's essential to consult the KernelSU documentation or community forum for further assistance.

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