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I have an external monitor plugged to my laptop. I mostly use my laptop screen and use the external as a secondary monitor, sometimes not even turning it on.

When I start the computer, the login screen is always on the external monitor. I need it to be on the main laptop screen.

As a side note, in "Displays" my secondary appears as "Unknown" and has a very low resolution. But that would be for a different question here...

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