To disable the spell checker on LineageOS using ADB, you can use the following command:
- Connect your device to your computer and open a terminal or command prompt.
- Enter the ADB shell with:
- Then, run:
settings put secure spell_checker_enabled 0
- Reboot your device for the changes to take effect.
This method is confirmed to work on various Android ROMs, including LineageOS, and will globally disable the spell checker for all text inputs.
If you encounter permission issues, you may need root access or to run the command as superuser (su) in the ADB shell.