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dyrok/disable-gpsu-bootloops

KSU/Magisk module to prevent Google Play System Update (GPSU) APEX bootloops on legacy Exynos devices

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androidapexbootloopcustom-romexynosgalaxy-s9google-play-system-updategpsukernelsukernelsu-modulemagiskmagisk-modulesamsungtwrp

README

quick note: my s9+ broke (dropped it in a swimming pool :p) i wont be able to test if this currently works or not... if it doesnt just do the emergency fix and itll be fine you can do it from twrp file browser aswell just delete the apex folder in the respective dir

Disable GPSU APEX Updates (bootloops)

A KernelSU / Magisk module that prevents Google Play System Update (GPSU) APEX modules from staging and causing bootloops on legacy Exynos devices.

Problem

Google's Play System Updates deliver APEX module updates silently through Google Play Services. On devices running custom ROMs beyond their official support (e.g., Galaxy S9/S9+/Note9 on One UI 7), these APEX updates can be incompatible with the device's vendor blobs and kernel, causing bootloops — especially if interrupted by a power loss.

What This Module Does

Two layers of protection:

  1. post-fs-data.sh — Runs early on every boot, before apexd activates. Wipes /data/apex/sessions/* so even if an update gets staged, it never activates.
  2. service.sh — Runs after boot complete. Disables com.google.android.modulemetadata so Google Play stops delivering APEX updates entirely.

Supported Devices

Tested on:

  • Samsung Galaxy S9+ (G965F) — Exynos 9810, Duhan ROM One UI 7, KSU Next

Should work on any rooted Android device experiencing GPSU-related bootloops.

Installation

Via KernelSU / Magisk Manager

  1. Download the latest release zip from Releases
  2. Open KernelSU Manager or Magisk Manager
  3. Install the module zip
  4. Reboot

Manual (from TWRP recovery)

If you're already bootlooping:

  1. Boot into TWRP recovery
  2. Connect via USB
  3. Run: 
    adb shell rm -rf /data/apex
adb shell mkdir -p /data/adb/modules/disable-gpsu
adb push module.prop /data/adb/modules/disable-gpsu/
adb push post-fs-data.sh /data/adb/modules/disable-gpsu/
adb push service.sh /data/adb/modules/disable-gpsu/
adb shell chmod 755 /data/adb/modules/disable-gpsu/post-fs-data.sh
adb shell chmod 755 /data/adb/modules/disable-gpsu/service.sh
  4. Reboot: adb reboot

Emergency Fix (no permanent install)

If you just need to boot once without installing the module:

adb shell rm -rf /data/apex
adb reboot

This clears the corrupted APEX cache. The system will regenerate it from the system partition. Note: without the module, GPSU will re-stage the bad update eventually.

Uninstalling

Remove the module from KernelSU/Magisk Manager, or:

adb shell rm -rf /data/adb/modules/disable-gpsu
adb reboot

This re-enables GPSU APEX updates.

License

MIT

Contributors

dyrok

Issues