Yes, exactly. If you need to be able to control what goes to the display and take that away from the OS, you need a hardware I/O device.
OS notifications and alerts are just examples of any number of things that could be displayed that are unwanted. In situations where something like that makes the setup "unusable", you have to have a hardware I/O device. There's not another option.
OS notifications and alerts are just examples of any number of things that could be displayed that are unwanted. In situations where something like that makes the setup "unusable", you have to have a hardware I/O device. There's not another option.