# Skyworth 7T861_A23 (MediaTek MT9638, Coocaa OS on Android 10): debloat, custom home shim and boot safety Owner report for a China-market Skyworth 7T861_A23 television running Coocaa OS on Android 10. The debloat package list for this unit lives in [`examples/skyworth-7t861-a23/debloat.txt`](../../examples/skyworth-7t861-a23/debloat.txt) and its launcher configuration in [`examples/skyworth-7t861-a23/config.json`](../../examples/skyworth-7t861-a23/config.json). ## Observed firmware | Field | Observed value | |---|---| | Model | `7T861_A23` | | Product / device | `mt9638` (`mt5872`) | | Manufacturer | `skyworth` | | Android / API | `10` / `29` | | Build display id | `QQ2A.200305.004.A1 release-keys` / `eng.nobody.20241225.120706` | | Application ABIs | `armeabi-v7a, armeabi` (32-bit userspace) | | `ro.adb.secure` | `0` | | `service.adb.tcp.port` | `5555` | | Stock home | `com.skyworth.officehomepage` (OfficeMode) / `com.tianci.movieplatform` | | TV inputs & source manager | `com.skyworth.tv` | Port 5555 opens over Wi-Fi without pairing prompts (`ro.adb.secure=0`). `persist.service.adb.enable=1` and `persist.sys.openadb=1` keep network ADB open across reboots. --- ## Safety Warning: Critical Packages to Keep > [!CAUTION] > **Do not disable any of these critical system packages:** > - **`com.skyworth.officehomepage`** & **`com.tianci.movieplatform`**: Stock launchers for Office Mode and Standard Mode. The Coocaa OS boot flow hard-depends on them; disabling either causes the system to hang indefinitely at the boot logo (network stack fails to start, ADB drops). > - **`com.loostone.tuning`**: Microphone tuning & audio HAL driver bridge. Disabling it triggers `AudioService`/HAL self-test timeouts and boot hangs. > - **`com.tianci.user`**: User authentication & token provider with strong IPC Binder dependencies across system framework daemons. > > Recovery requires entering hardware Recovery Mode and performing a factory reset ("Wipe data / factory reset"). **Keep all four enabled at all times.** --- ## Debloat verification: persistence across cold reboot The packages in [`examples/skyworth-7t861-a23/debloat.txt`](../../examples/skyworth-7t861-a23/debloat.txt) remove telemetry, ad daemons, app store push services, and factory background tools. ### Recommended: Zero Debloat via Native Office Mode > [!TIP] > **Debloating is optional on this firmware.** > If the TV is switched to **办公模式 (Office Mode)** in the native system settings, Coocaa OS internally suppresses all video streaming recommendations, banner advertisements, and background cloud preloading. > > Setting up CleanYourTV under native Office Mode produces an instant cold boot with **zero native loading screens** ("正在准备..."), while leaving all system packages fully intact (`pm list packages -d` remains empty), eliminating any risk of boot hangs. ### Verified safe to disable (12 packages) - **Telemetry & Diagnostics (4)**: `com.skyworth.performance.monitors`, `com.skyworth.testtime`, `com.skyworthdigital.stb.dataprovider`, `com.skyworth.device` - **Ads & Manufacturer Push (3)**: `com.coocaa.tvmanager`, `com.coocaa.guide`, `com.tianci.de` - **Preloaded Stores & Streaming (4)**: `com.coocaa.tvpitv`, `com.tianci.appstore`, `com.skyworth.skymarket`, `com.coocaa.app_browser` - **Factory & System (1)**: `com.coocaa.factory` ### Must stay enabled (Critical system lifelines) | Package | Purpose / Why it must stay enabled | |---|---| | `com.skyworth.officehomepage` | Office Mode stock home; disabling breaks system boot chain and hangs indefinitely on boot logo | | `com.tianci.movieplatform` | Standard Mode stock home base; boot chain hardcoded dependency, disabling causes fatal boot hang on COOCAA/SKYWORTH logo | | `com.loostone.tuning` | Loostone microphone tuning and audio HAL driver bridge; disabling causes AudioService / HAL timeout during boot | | `com.tianci.user` | Coocaa user account & auth service; framework Binder IPC dependency | | `com.skyworth.tv` | HDMI, AV, and TV tuner input switching; picture and sound settings | | `com.tianci.localmedia` | Built-in USB media player and local storage access | --- ## Replacing Home: Coocaa OS boot and Home key mechanism Coocaa OS does not use Android's standard `Intent.CATEGORY_HOME` activity chooser. For seamless cold boot without native transition overlays, follow this setup sequence: ### Step 0: Switch to Office Mode in TV Settings Before installing CleanYourTV or redirecting properties, switch the television's desktop to **办公模式 (Office Mode)** using the remote in native system settings/menu. This ensures the firmware records `OfficeMode` as the active scene in its persistent database, silencing the video recommendation engine. ### Step 1: Build the launcher under Coocaa package ID Compile the launcher with the Coocaa application ID so it is recognized as a privileged OEM package by the process manager: ```bash cd launcher ./gradlew assembleRelease -PlauncherApplicationId=com.coocaa.tvhome ``` ### Step 2: Install launcher and coocaa-home-shim Install the compiled launcher and the companion `coocaa-home-shim` (`com.ccos.tv.homepage`), which bridges Coocaa OS home dispatch to the CleanYourTV activity. The shim is not part of this repository: it is its own project, [coocaa-home-shim](https://github.com/VincentYe123/coocaa-home-shim), whose releases page carries the APK (or build it from source). `tools/tv.py` installs nothing on its own, so an APK goes up with `tools/b64push.py` and the TV's own `pm install` runs it, the way [`examples/skyworth-7s60-a5`](../../examples/skyworth-7s60-a5/README.md) does it on the same OS: ```bash TV_HOST= tools/venv/bin/python -I tools/b64push.py launcher/app/build/outputs/apk/release/app-release.apk /data/local/tmp/tvhome.apk TV_HOST= tools/tv.py 'pm install -r /data/local/tmp/tvhome.apk; rm -f /data/local/tmp/tvhome.apk' TV_HOST= tools/venv/bin/python -I tools/b64push.py coocaa-home-shim.apk /data/local/tmp/shim.apk TV_HOST= tools/tv.py 'pm install -r /data/local/tmp/shim.apk; rm -f /data/local/tmp/shim.apk' TV_HOST= tools/tv.py 'cmd appops set com.ccos.tv.homepage SYSTEM_ALERT_WINDOW allow' ``` > [!NOTE] > On Android 10, the background activity start restriction requires granting `SYSTEM_ALERT_WINDOW` permission to `com.ccos.tv.homepage` (`cmd appops set com.ccos.tv.homepage SYSTEM_ALERT_WINDOW allow`) so the shim can reliably bring CleanYourTV to the foreground when the physical remote Home button is pressed from within background apps. ### Step 3: Redirect Coocaa Home properties (Direct Cold-Boot + Remote Key Dispatch) Coocaa OS uses a dual-track home dispatch mechanism governed by `/system/etc/bootintent.xml` in `system_server`: - **Cold-boot priority (`modelhome`)**: On system boot, `sky_launcher` evaluates `modelhome` first: ```xml ``` Pointing `persist.service.model.*` directly to CleanYourTV (`com.coocaa.tvhome/com.gathin.tvhome.MainActivity`) allows `system_server` to launch CleanYourTV directly upon boot without flashing OEM desktop layouts or triggering intermediate "正在准备..." loading screens. - **Physical Remote Home key dispatch (`persist.service.homepage.*`)**: When third-party apps are running, remote Home button presses are routed to `persist.service.homepage.*`. Pointing these to `com.ccos.tv.homepage` allows `coocaa-home-shim` to instantly return focus to CleanYourTV. Apply the properties using `tools/tv.py`: ```bash # 1. Cold boot: launch CleanYourTV directly via modelhome TV_HOST= tools/tv.py 'setprop persist.service.model.pkg com.coocaa.tvhome' TV_HOST= tools/tv.py 'setprop persist.service.model.cls com.gathin.tvhome.MainActivity' TV_HOST= tools/tv.py 'setprop persist.service.model.name CleanYourTV' # 2. Remote Home key: dispatch through shim TV_HOST= tools/tv.py 'setprop persist.service.homepage.pkg com.ccos.tv.homepage' TV_HOST= tools/tv.py 'setprop persist.service.homepage.cls com.ccos.tv.homepage.LaunchActivity' ``` > [!TIP] > Setting `persist.service.model.name` to `CleanYourTV` replaces the native desktop mode identifier. In system Settings, "系统模式 (System Mode)" will appear unselected, preventing the system from automatically triggering OEM mode initialization delays. --- ## Cold boot behavior After a cold boot (power unplugged and restored): - Coocaa OS `system_server` matches `modelhome` from `/system/etc/bootintent.xml` and launches `com.coocaa.tvhome.MainActivity` directly. - Boots into CleanYourTV seamlessly with zero intermediate loading screens ("正在准备...") and zero desktop flash. - `dumpsys window | grep mCurrentFocus` settles directly on: ```text mCurrentFocus=Window{... u0 com.coocaa.tvhome/com.gathin.tvhome.MainActivity} ``` - Physical remote Home button presses immediately return to CleanYourTV without latency or flickering. - ADB port 5555 reconnects cleanly over Wi-Fi. --- ## Undo steps: Restoring stock home To restore the TV's original stock desktop dispatch properties: ```bash # 1. Restore Coocaa Home system properties to stock components TV_HOST= tools/tv.py 'setprop persist.service.homepage.pkg com.tianci.movieplatform' TV_HOST= tools/tv.py 'setprop persist.service.homepage.cls com.coocaa.homepage.vast.HomePageActivity' TV_HOST= tools/tv.py 'setprop persist.service.model.pkg com.skyworth.officehomepage' TV_HOST= tools/tv.py 'setprop persist.service.model.cls com.skyworth.officehomepage.view.HomepageActivity' TV_HOST= tools/tv.py 'setprop persist.service.model.name OfficeMode' TV_HOST= tools/tv.py 'cmd appops set com.ccos.tv.homepage SYSTEM_ALERT_WINDOW default' # 2. Launch stock desktop TV_HOST= tools/tv.py 'am start -n com.skyworth.officehomepage/.view.HomepageActivity' ``` If removing the custom launcher and shim completely: ```bash TV_HOST= tools/tv.py 'pm uninstall com.coocaa.tvhome' TV_HOST= tools/tv.py 'pm uninstall com.ccos.tv.homepage' ``` --- ## Inputs and Source Switching `com.skyworth.tv` manages HDMI, AV, and TV tuner input sources, as well as picture adjustments. Keep it enabled. In `config.json`: - `"show_inputs_pill": true` - `"coocaa_sources": true` This enables the top-bar Inputs pill to open the native Skyworth source picker directly.