Sleep external monitor on laptop screen closed

Hello! i use an external monitor with my laptop id like it to shut off once i close the lid but instead all the content from my laptop monitor gets pushed to my main monitor. thus far ive tried changing setting in dconf namely org.gnome.settings-daemon.plugins.power lid-close-battery-action 'logout' but that hasnt worked.

'Logout' doesn't shutdown the computer. You need 'poweroff'.

You could try this:

ive already tried this. thanks though

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