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Magic Mount Detected After Returning to Magisk From KSU: A Comprehensive Removal Guide

Experiencing a persistent “Magic Mount detected” message after transitioning from KernelSU (KSU) back to Magisk can be frustrating. This guide provides a detailed, step-by-step approach to completely eliminate the remnant, ensuring a clean Magisk environment and optimal system performance. We understand the nuances of these tools and their interaction, and our aim is to provide a solution that surpasses existing resources in clarity and comprehensiveness. We will delve into the core of the issue, offering multiple solutions based on the varied scenarios users might face.

Understanding the Root Cause: Magic Mount and Kernel Modification

Before diving into the fixes, let’s understand why this issue arises. KernelSU and Magisk operate on similar, yet distinct principles of system modification. Both tools leverage the “magic mount” technique, albeit with differing implementations and storage locations. When switching between them, remnants of the previous system’s magic mount configurations can linger, leading to conflicts and the persistent “Magic Mount detected” message. This is particularly true if KSU was not fully uninstalled before installing or re-enabling Magisk. The problem typically stems from leftover files or directories that were intended to be used by KSU for its modifications, but are now interfering with Magisk’s operation. These files can trick the system into thinking a module or modification is active when it isn’t, leading to the warning message.

Preliminary Steps: Preparation and Backups

Before attempting any modifications, backing up your device is paramount. A full system backup using TWRP or a similar custom recovery is strongly recommended. This ensures that you can revert to a stable state if anything goes wrong during the process. Further, note down your existing Magisk modules configuration. List the modules you have installed and, if possible, back up their configurations, as some might require re-configuration after a complete Magisk re-installation.

Essential Backup Checklist:

Method 1: Complete Magisk Uninstallation and Reinstallation

This is the most effective method to ensure a clean slate. This involves uninstalling Magisk completely, removing any residual files, and then reinstalling it from scratch.

Step 1: Uninstall Magisk

Step 2: Verify Magisk Uninstallation

After rebooting, check if the Magisk Manager app is completely removed from your device. If not, manually uninstall it from the app settings.

Step 3: Manually Remove Residual Files and Directories

This is the most critical step and requires root access using a file manager like Solid Explorer or MiXplorer (you might need to temporarily flash a minimal Magisk version just for this step, if you don’t have root access through other means). Navigate to the following locations and delete any folders or files related to Magisk or KSU:

Caution: Be extremely careful when deleting files in these directories. Deleting essential system files can render your device unusable. Double-check the file names before deleting them.

To ensure a completely clean system, flashing your device’s stock boot image is highly recommended. This will revert any kernel modifications made by KSU or previous Magisk installations.

Step 5: Reinstall Magisk

After completing these steps, the “Magic Mount detected” message should be gone, and Magisk should be functioning correctly.

Method 2: Targeted Removal of KSU Remnants

If the complete Magisk reinstallation doesn’t work, the problem might be specific KSU files interfering with Magisk. This method focuses on identifying and removing those files directly.

Step 1: Identify Potential KSU Files

KernelSU uses different directory structures than Magisk, but some common locations where remnants might be found include:

Step 2: Remove Identified KSU Files

Using a root-enabled file manager, carefully navigate to the identified locations and delete any files or folders associated with KSU. As with Method 1, be extremely cautious not to delete essential system files.

Step 3: Reboot and Check

After removing the KSU files, reboot your device and check if the “Magic Mount detected” message persists.

Method 3: Using Magisk Module Manager to Disable Conflicting Modules

Sometimes, a conflicting module – either a Magisk module or a KSU module that wasn’t properly uninstalled – can trigger the “Magic Mount detected” message.

Step 1: Boot into Safe Mode (if possible)

Some devices allow booting into safe mode, which disables all Magisk modules. This can help determine if a module is the culprit.

Step 2: Disable Modules Individually

If safe mode isn’t an option, or if the issue persists in safe mode, open the Magisk Manager and disable modules one by one, rebooting after each disablement to check if the message disappears. This process will help isolate the conflicting module.

Step 3: Uninstall the Conflicting Module

Once you’ve identified the conflicting module, uninstall it completely through the Magisk Manager.

This method is more advanced and involves examining system initialization files for any remnants of KSU configuration that might be interfering with Magisk.

Step 1: Access and Examine init.rc

Search for any lines containing “ksu,” “kernelsu,” or related terms. These entries might be attempting to mount or modify system partitions, leading to conflicts.

Step 3: Comment Out or Remove KSU Entries

Carefully comment out or remove any KSU-related entries you find. Caution: Incorrectly modifying init.rc can cause your device to fail to boot. Make a backup of the file before making any changes.

Step 4: Examine Other init.*.rc Files

In addition to init.rc, also check other init.*.rc files in the root directory and in the /system/etc/init/ directory for any KSU-related entries.

Step 5: Reboot Your Device

After modifying the init.rc files, reboot your device to apply the changes.

Troubleshooting and Advanced Scenarios

Persistent Issue After All Methods:

If the “Magic Mount detected” message persists after trying all the above methods, the problem might be more deeply rooted in the system partition. This could require reflashing the entire ROM.

Bootloops:

If your device enters a bootloop after making any modifications, restore your system backup from TWRP or flash the stock ROM.

Kernel Conflicts:

If you’re using a custom kernel, it might be conflicting with Magisk. Try switching back to the stock kernel to see if that resolves the issue.

Conclusion: Ensuring a Clean Magisk Environment

Removing the “Magic Mount detected” message after using KernelSU requires a methodical approach. By following these detailed steps, you can effectively eliminate KSU remnants and ensure a clean, functional Magisk environment. Remember to always back up your device before making any system modifications and exercise caution when deleting or modifying system files. Our goal is to empower users with the knowledge and tools to confidently manage their Android devices and enjoy the benefits of both Magisk and KernelSU, without the frustration of persistent errors. By keeping your Magisk installation clean and current, through the modules available at our Magisk Modules repository, found at Magisk Module Repository, you will minimize the likelihood of future conflicts and optimize the performance of your device.

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