Install LineageOS on foster

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Basic requirements

  1. Make sure your computer has adb and fastboot. Setup instructions can be found here.
  2. Enable USB debugging on your device.

Special Considerations

The Shield TV Pro (2015) has some additional quirks you’ll want to be aware of.

To discern if you have this model, you can run the following command on stock:

adb shell getprop ro.hardware

If this command returns anything other than foster_e_hdd or jetson_cv, proceed with the install process. If it returns foster_e_hdd please take note that the fastboot oem unlock command the instrutions below will have you run can take up to 90 minutes. This is due to the fact that the device is securely wiping near to 500 GB of hard disk.

If it returns jetson_cv, or if you have a fresh Jetson TX1, the installation instructions require a Linux host to install, and getting Linux up and running won’t be covered here.

  1. Download a flash package.
    • It will be named p2371_flash_package.tar.xz
  2. Install xz and python3. To do so, run sudo apt -y install xz-utils python3 (Debian based hosts) or dnf -y install xz-utils python3 (Redhat based hosts).
  3. Run the following command in the folder which you downloaded the flash package to tar -xvf p2371_flash_package.tar.xz.
  4. Power off the device, and boot it into download mode:
    • With the device off, press the FRC REC button, then tap power. Release the FRC REC button once the device enumerates in APX mode, to discern this, run sudo dmesg on your host, and look for “Product: APX”, if it doesn’t show, please try this step again or try a different USB cable/port until it enumerates.
  5. Now, from the same terminal as before, run:
    sudo ./flash.sh
    
  6. The script will flash the boot stack and boot directly to LineageOS Recovery. Now, please skip to the section labeled “Installing LineageOS from recovery”:

Unlocking the bootloader

  1. Connect the device to your PC via USB.
  2. On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type:
    adb reboot bootloader
    
  3. Once the device is in fastboot mode, verify your PC finds it by typing:
    fastboot devices
    
  4. Now type the following command to unlock the bootloader:

    fastboot oem unlock
    
  5. If the device doesn’t automatically reboot, reboot it. It should now be unlocked.
  6. Since the device resets completely, you will need to re-enable USB debugging to continue.

Installing a custom recovery using fastboot

  1. Download a custom recovery - you can download Lineage Recovery. Simply download the latest recovery file, named something like lineage-17.1-20211119-recovery-foster.img.

  2. Connect your device to your PC via USB.
  3. On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type:
    adb reboot bootloader
    
  4. Once the device is in fastboot mode, verify your PC finds it by typing:
    fastboot devices
    
  5. Flash recovery onto your device:
    fastboot flash recovery <recovery_filename>.img
    
  6. Now reboot into recovery to verify the installation:
    • With the device powered off, plug the included Shield controller into the USB-A port on the back of the device. Next, hold the A button and B button while plugging the device into power, continue until a menu is displayed. Tap the Y button until “Boot recovery kernel” is selected. Now, press the A button to select this option.

Installing LineageOS from recovery

  1. Download the LineageOS installation package that you would like to install or build the package yourself.
  2. If you are not in recovery, reboot into recovery:
    • With the device powered off, plug the included Shield controller into the USB-A port on the back of the device. Next, hold the A button and B button while plugging the device into power, continue until a menu is displayed. Tap the Y button until “Boot recovery kernel” is selected. Now, press the A button to select this option.
  3. Now tap Factory Reset, then Format data / factory reset and continue with the formatting process. This will remove encryption and delete all files stored in the internal storage, as well as format your cache partition (if you have one).
  4. Return to the main menu.
  5. Sideload the LineageOS .zip package:
    • On the device, select “Apply Update”, then “Apply from ADB” to begin sideload.
    • On the host machine, sideload the package using: adb sideload filename.zip.
  6. (Optionally): If you want to install any add-ons, repeat the sideload steps above for those packages in sequence.

  7. Once you have installed everything successfully, click the back arrow in the top left of the screen, then “Reboot system now”.