SystemUI JIT Fix

Stop SystemUI restarts · Stop lockscreen loops

by ridhzlabs

🇬🇧 English · 🇮🇩 Bahasa Indonesia

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🇬🇧 English

What is this?

A tiny root module that stops SystemUI from crashing back to the lockscreen every ~30–60 minutes on the RealmeUI 7 port for Redmi Note 14 Pro 5G (malachite) — and on any ROM with the same symptom.

What is inside?

File	Purpose
service.sh	Runs on every boot: re-applies the fix (skips if already applied)
action.sh	Manual "Execute" button in the manager app
module.prop	Module metadata + banner + updateJson (auto-update)
banner.png	Banner shown in KernelSU Next manager
META-INF/	Universal installer (Magisk + KernelSU Next + APatch)

No system files are replaced. No background service. Total size < 35 KB.

How does the fix work?

Tombstone forensics (8 identical crashes) proved this is an ART JIT compiler crash, not a normal app crash:

signal 11 (SIGSEGV), fault addr 0x30
thread "Jit thread pool" >>> com.android.systemui <<<
libart.so: HInliner → HInstructionBuilder (null dereference)

The JIT compiler tries to compile one hot method inside the repacked SystemUI, and the compiler itself crashes (beta CANARY ART build). It is deterministic — root modules and Play Integrity were both ruled out by comparing crash timestamps against module install times.

The fix: fully AOT-compile SystemUI (speed filter)

cmd package compile -m speed -f com.android.systemui

With every method pre-compiled, the JIT never touches the crashing method, so the compiler bug never triggers. This is a workaround, not an ART patch — but it is stable, tiny, and fully reversible.

Advantages

• ⚡ Lightweight — < 35 KB, one shell script, zero background processes
• 🔧 Practical — install once, the fix re-applies itself every boot
• 🔄 Auto-update — updateJson wired to GitHub Releases, update from the manager app
• 🛡️ Safe — touches no system files; uninstall = gone
• 📦 Universal — one zip flashes on Magisk, KernelSU Next, and APatch

Tutorial

Option A — Flash the module (recommended)

1. Download SystemUI_JIT_Fix-vX.X.zip from Releases.
2. KernelSU Next: Modules → Install from storage → pick the zip. Magisk: Modules → Install from storage → pick the zip.
3. Reboot.
4. Verify (adb or Termux):

   dumpsys package com.android.systemui | grep -m1 -o '\[status=[a-z-]*\]'
   

   Expected: [status=speed]
5. Use the phone normally for 2–3 hours — no more lockscreen loops.

Option B — ADB only (no module, no root)

Same effect, repeat manually if dexopt ever resets:

adb shell "cmd package compile -m speed -f com.android.systemui"

Verify it worked

adb shell "logcat -b crash -d" | grep -i systemui   # must be empty

Uninstall / revert

Remove the module in the manager app → reboot. To restore the default compile filter: cmd package compile -m verify -f com.android.systemui.

Who is this for?

• RealmeUI 7 port users on malachite (Redmi Note 14 Pro 5G) with periodic SystemUI restarts to lockscreen.
• Anyone with the same signature: Jit thread pool + com.android.systemui + SIGSEGV fault addr 0x30 in tombstones.

Credits

• Author: ridhzlabs
• Forensics: ART tombstone analysis on-device via adb

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🇮🇩 Bahasa Indonesia

Ini apa?

Module root super kecil yang menghentikan SystemUI crash balik ke lockscreen tiap ~30–60 menit di port RealmeUI 7 untuk Redmi Note 14 Pro 5G (malachite) — dan di ROM apapun dengan gejala yang sama.

Isinya apa?

File	Fungsi
service.sh	Jalan tiap boot: menerapkan ulang fix (skip kalau sudah teraplikasi)
action.sh	Tombol "Execute" manual di aplikasi manager
module.prop	Metadata module + banner + updateJson (auto-update)
banner.png	Banner yang tampil di manager KernelSU Next
META-INF/	Installer universal (Magisk + KernelSU Next + APatch)

Tidak ada file system yang diganti. Tidak ada service background. Total < 35 KB.

Cara kerja fix-nya gimana?

Forensik tombstone (8 crash identik) membuktikan ini crash di ART JIT compiler, bukan app crash biasa:

signal 11 (SIGSEGV), fault addr 0x30
thread "Jit thread pool" >>> com.android.systemui <<<
libart.so: HInliner → HInstructionBuilder (null dereference)

JIT mencoba compile satu method panas di SystemUI hasil repack, lalu compiler-nya sendiri yang crash (ART beta CANARY). Deterministik — modul root dan Play Integrity sudah terbukti bukan pelaku via cek timeline tombstone vs waktu install.

Fix-nya: compile SystemUI penuh (AOT, filter speed)

cmd package compile -m speed -f com.android.systemui

Karena semua method sudah pre-compile, JIT tidak pernah menyentuh method pemicu crash, jadi bug compiler tidak kepicu. Ini workaround, bukan patch ART — tapi stabil, kecil, dan sepenuhnya reversible.

Keunggulan

• ⚡ Ringan — < 35 KB, satu shell script, nol proses background
• 🔧 Praktis — install sekali, fix teraplikasi otomatis tiap boot
• 🔄 Auto-update — updateJson tersambung ke GitHub Releases, update dari aplikasi manager
• 🛡️ Aman — tidak menyentuh file system; uninstall = hilang total
• 📦 Universal — satu zip bisa di-flash di Magisk, KernelSU Next, dan APatch

Tutorial

Cara A — Flash module (disarankan)

1. Download SystemUI_JIT_Fix-vX.X.zip dari Releases.
2. KernelSU Next: Modules → Install from storage → pilih zip. Magisk: Modules → Install from storage → pilih zip.
3. Reboot.
4. Verifikasi (adb atau Termux):

   dumpsys package com.android.systemui | grep -m1 -o '\[status=[a-z-]*\]'
   

   Harus keluar [status=speed].
5. Pakai HP normal 2–3 jam — tidak ada lagi loop lockscreen.

Cara B — ADB saja (tanpa module, tanpa root)

Efeknya sama, ulangi manual kalau dexopt ke-reset:

adb shell "cmd package compile -m speed -f com.android.systemui"

Verifikasi berhasil

adb shell "logcat -b crash -d" | grep -i systemui   # harus kosong

Uninstall / revert

Hapus module dari aplikasi manager → reboot. Untuk kembalikan filter default: cmd package compile -m verify -f com.android.systemui.

Ini buat siapa?

• Pengguna port RealmeUI 7 di malachite (Redmi Note 14 Pro 5G) yang SystemUI-nya restart berkala ke lockscreen.
• Siapapun dengan signature sama: Jit thread pool + com.android.systemui + SIGSEGV fault addr 0x30 di tombstone.

Kredit

• Author: ridhzlabs
• Forensik: analisa tombstone ART langsung di device via adb

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© ridhzlabs — SystemUI JIT Fix