When there is big non interactive software running and if I required more processing power then, after removing the desktop screen does kernel stops processing related to GUI(graphical user interface) so that CPU can focus on other stuff.I am assuming that If we don't have external graphics card then, processing related to it handled by cpu.Correct my assumption if I am going wrong. If I am wrong then, how GUI is managed?And what type of  processing  done by CPU?
Does linux stops processing related to GUI when we remove the desktop screen from connection from cabinet(CPU box)?
linux kernel;gui;scheduling;intel graphics;cpu usage