Comprehensive Troubleshooting Guide: Resolving Shamiko Crashing System UI and Roblox Root Detection

Understanding the Core Issue: Shamiko Crashing System UI on Android Custom ROMs

We understand the frustration that arises when a critical system modification, intended to enhance functionality, instead leads to a catastrophic failure of the user interface. The scenario described involves transitioning from one root hiding solution to Shamiko, resulting in a persistent black screen and boot loop artifacts on a Motorola G32 running LineageOS 23.0 (based on Android 13/14/15, though the user mentioned Android 16, likely a typo for a newer custom build). This is a complex issue rooted in the interaction between the Magisk environment, the specific Zygisk or Riru framework requirements of Shamiko, and the unique architecture of the device’s custom ROM.

The primary objective of this guide is to provide a definitive, technical breakdown of why the System UI crash occurred and to offer a robust, step-by-step methodology for stabilizing the system. Furthermore, we will address the secondary but equally critical issue of bypassing Roblox’s anti-cheat detection, which is notoriously aggressive in identifying modified environments. By leveraging the advanced capabilities of the Magisk Modules repository found at Magisk Modules, we can deploy sophisticated mitigation techniques.

The Anatomy of a Black Screen Boot Loop with Shamiko

When a device hangs on the boot animation and eventually presents a black screen with a non-responsive System UI, the root cause is almost always a failure in the Zygote process. Android relies on the Zygote process to spawn every new application instance. Both Magisk and root hiding frameworks inject themselves into this process.

Shamiko is an advanced root hiding module that functions as a companion to Zygisk. Unlike older Riru-based modules, Shamiko operates by modifying the internal behavior of the Zygote process to mask the presence of Magisk libraries.

Incompatibility with Zygisk State

The user explicitly mentioned uninstalling “nohello” (likely referring to a module like “MagiskHide Props Config” or a generic Zygisk module) to install Shamiko. The critical error here likely stems from one of three factors:

1. Conflicting Zygisk Modules: If the previous module modified system.prop or Zygote startup scripts that Shamiko also attempted to modify, the result is a race condition or syntax error during Zygote initialization.
2. Magisk Version Mismatch: The user reported Magisk 30.6. This is a very specific, often alpha or canary build. Shamiko is frequently updated to support specific Magisk versions. Using an older or unstable Magisk build (even if the version number is high) with a cutting-edge root hider can lead to undefined behavior in the magiskd daemon, causing the System UI to fail to start.
3. SELinux Policy Violations: LineageOS maintains strict SELinux enforcement. Shamiko attempts to loosen these policies to allow root access to hide. If Shamiko fails to properly patch the SELinux context in memory during boot, the Android OS will kill the System UI process immediately upon launch for security reasons, resulting in the black screen.

Analyzing the Device Environment: Motorola G32 and LineageOS

The Motorola G32 (XT2235-3) is a mid-range device with a specific hardware abstraction layer (HAL). Running LineageOS 23.0 introduces another layer of complexity.

Bootloader and SafetyNet/Play Integrity

Motorola devices usually require the bootloader to be unlocked to install LineageOS. This action permanently trips the Hardware Backed TrustZone flags.

• Bootloader Unlock State: While necessary for rooting, this state is easily detectable by high-level applications like Roblox. Even with Shamiko hiding the ro.boot.verifiedbootstate properties, the underlying hardware attestation (Play Integrity API) may still fail.
• Vendor Security Patches: LineageOS often backports security patches. If the vendor’s specific kernel drivers for the G32 are not perfectly compatible with the Magisk kernel patch (specifically the magiskinit process), the mounting of /data or /vendor partitions can fail, preventing the UI from loading the necessary configuration files.

Remediation: Restoring System Stability and Installing Shamiko Correctly

To recover from the black screen and successfully install Shamiko without crashing the System UI, we must follow a strict procedural order. We assume the device is currently in a working state after the removal of Shamiko.

Step 1: Pristine Environment Verification

Before attempting to reinstall Shamiko, we must ensure the Magisk environment is clean.

1. Check Magisk Kernel Patch: Open the Magisk app and verify that “Installed” matches the latest version (e.g., 27000+). If the user is on Magisk 30.6 (canary), ensure the boot.img patched by Magisk matches the exact LineageOS build date.
2. Remove Leftover Artifacts: Even after uninstalling a module, files can persist in /data/adb/modules. Use a root file explorer or terminal to navigate to this directory and ensure no folders related to “nohello” or other Zygisk modules exist.

Step 2: The Correct Shamiko Installation Protocol

We recommend downloading the latest stable release of Shamiko from the Magisk Module Repository.

1. Enable Zygisk: Open Magisk Settings > Zygisk. Toggle it ON. Reboot is required.
2. Configure DenyList: Go to Configure DenyList. Select the target app (Roblox) and any system apps (like Google Play Services, Google Play Store) if you are using Magisk DenyList for SafetyNet/Play Integrity.
   • Note: Shamiko works best when Magisk’s native “Enforce DenyList” is OFF (unchecked). Shamiko handles the hiding internally. However, for apps like Roblox, it is often necessary to enable the DenyList for the specific app to trigger Shamiko’s deeper hiding mechanisms.
3. Install Shamiko: Flash the Shamiko zip file in the Magisk app (Modules section) or via custom recovery (TWRP/OrangeFox).
4. Reboot Analysis: Upon reboot, monitor the boot animation.
   • If it hangs: The issue is likely Zygisk. Reboot to recovery, remove the Shamiko module via the “Remove Modules” option in recovery, and reboot to system. You may need to downgrade Magisk to a stable release (like v26.1 or v27.0) if the canary build (30.6) is unstable with the specific Shamiko version.
   • If it boots: Immediately open Magisk. Check if “Ramdisk” is “Yes” (which is standard for LineageOS with Magisk installed via boot.img).

Advanced Root Hiding for Roblox: Bypassing “Security Threat” Errors

The user reported that Roblox is crashing with a “Security Threat” error. This is the Hyperion Anti-Cheat system detecting the modified environment.

Why Standard Hiding Fails with Roblox

Roblox uses multiple detection vectors:

1. File Presence Check: Scans for su, magisk, or xposed binaries in common directories.
2. Property Inspection: Checks ro.debuggable, ro.secure, and selinux status.
3. Memory Integrity: Detects hooked functions (used by older Zygisk modules).
4. Hardware Attestation: Uses Play Integrity API v2/v3 to verify the device’s software state.

Solution: Implementing Shamiko with Systemless Hosts and Props

We must harden the device to appear completely stock.

Module 1: Shamiko (Already Installed)

Ensure Shamiko is active. Verify it is working by running magisk --list in a terminal. If it lists Magisk, Shamiko is not hiding it correctly.

Module 2: Universal SafetyNet Fix (USNF) / Play Integrity Fix

Download the latest Play Integrity Fix module from the Magisk Module Repository.

• This module spoofs the device fingerprint to that of a certified device (e.g., a Pixel device).
• Crucial for Motorola: Since the G32 is not certified for high-level Play Integrity on custom ROMs, this module fakes the ota_cert and fingerprint props in the build.prop file systemlessly.

Module 3: Tricky Store

If Play Integrity Fix alone does not pass the DEVICE_INTEGRITY check (which is required for Roblox on modern Android versions), we recommend installing Tricky Store.

• Tricky Store utilizes a custom keystore to bypass hardware-backed attestation. It is a more advanced solution for devices running custom ROMs like LineageOS.
• Configuration: You must configure Tricky Store to target the specific package name of Roblox.

Module 4: ReZygisk (Optional but Recommended)

If the standard Zygisk provided by Magisk is detected, consider using ReZygisk. This is a reimplementation of Zygisk that alters the injection method, making it harder for Roblox’s Hyperion to detect the Zygote hook.

The “Shamiko Blacklist” Configuration

Shamiko allows for a “Blacklist” feature. If Roblox is still crashing, you may need to create a shamiko.blacklist file in /data/adb/shamiko/.

• Method: Use a root file manager. Create a file named shamiko.blacklist.
• Contents: Add the package name com.roblox.client (or com.roblox.client.android depending on the version).
• Effect: This forces Shamiko to hide Magisk specifically and aggressively for this package, bypassing certain detection hooks that trigger the “Security Threat” crash.

Troubleshooting the “Security Threat” Crash Loop

If the user installs Shamiko and Roblox still crashes, follow this specific diagnostic flow:

Clearing App Data and Cache

The “Security Threat” error often persists in the app’s cache, flagging the device even after successful root hiding.

1. Go to Settings > Apps > Roblox.
2. Force Stop the app.
3. Clear Storage (not just cache). This resets the app’s internal state and forces it to re-evaluate the environment on the next launch.

Disabling Magisk Hide for Other Apps

Ensure that only Roblox is configured in the Magisk DenyList (if using Shamiko in standard mode). If you have too many apps checked, it can create a signature conflict. However, if you are using Shamiko’s “Unmount Namespace” feature, you can leave the DenyList empty (since Shamiko handles the unmounting).

Checking for Overlay Conflicts

If you are using apps like LSPosed or other system-level overlays, these are instant flags for Roblox.

• Advice: Disable LSPosed or any module that modifies the System UI visuals. Roblox checks for overlay services (like screen dimmers or FPS counters) and interprets them as injection tools.

Conclusion: Achieving a Stable Root and Game Compatibility

The black screen issue encountered with Shamiko on the Moto G32 running LineageOS was almost certainly caused by an interaction between the user’s specific Magisk version (30.6), the remnants of the previous “nohello” module, and the SELinux policies of the custom ROM. By fully cleaning the environment and ensuring Zygisk is properly configured, the system boot stability can be restored.

Regarding Roblox, the path to stability is paved with Play Integrity bypassing. Merely hiding root is no longer sufficient for modern anti-cheat systems. The combination of Shamiko, Play Integrity Fix, and potentially Tricky Store represents the current gold standard for maintaining root access while playing high-security applications.

We advise all users visiting Magisk Modules to verify the compatibility of their specific Android version and Magisk version before flashing complex modules like Shamiko. Custom ROMs like LineageOS vary wildly in their implementation of the Zygote process, and what works on a Pixel may cause a black screen on a Motorola. Proceed with caution, backup your boot.img, and always keep a custom recovery handy for emergency module removal.