Update README.md

[n-nino]

Thanks for your project, but I was looking for one that would turn off monitor, like pushing the physical button of it, not one that locks the system.

[mmiguel6288code]

Sorry for the long delay in replying. Regarding the README edit, when you close your laptop, different things happen depending on your settings, and there's nothing in this code that tells anything to lock the system. So I'm hesitant to incorporate the comment.

For my chromebook for example, by default it goes into hibernate mode, but I changed that so that it just turns the screen off to allow it to continue to stream things. I developed this for a personal home desktop + worklaptop triple monitor setup where I can run the script and then hit my KVM switch to move my keyboard/mouse to the other system. My monitors aren't part of the KVM switch, both computers are plugged into the monitors simultaneously, so this allows me to switch all three monitors in one command without manually changing each one at a time via physical button presses.

Is it possible that is the default behavior on your machine when the screen is turned off? It's hard to know what the behavior is on different machines/environments.