How to completely turn off the monitor on a laptop?

Question

linux

The built-in monitor does not work on the laptop (the matrix is ​​out of order), and therefore, the cover with the display is removed, and an external one is connected via VGA.
But there is one problem - the laptop defines its old monitor as the main one. I managed to disable it in the settings, the main one is now the one through VGA.
And yet, during startup, the laptop tries to display the login window on the "native" monitor. You have to enter a user and password at random. After logging in, does the external monitor become the main one again?
How to fix it?
Notebook - ASUS x402c Built-in
graphics (Intel HD Graphics 4000) A
temporary solution was to enable automatic login. But it doesn't fit

Answer 1

You set up the monics directly in the user's session. And login and password input is provided by gdm.
Try copying:
Well, either to /etc/gdm/.config/ , or perhaps to /var/lib/gdm/.config/ or /var/lib/gdm3/.config/.

Answer 2

Good day.
Wouldn't it be easier to short the lid sensor? I was lucky, I have a magnetic one, there was enough magnet.
Everything then immediately goes to the outside.

Answer 3

xrandr --output HDMI1 --primary
xset dpms force off

Answer 4

Maybe you can turn it off physically. Well, on or in the bios to shaman. Since he will continue to use that monitor as the main one and you will constantly reconfigure it like.

Answer 5

Maybe it's not the matrix that has failed, but the backlight has died? I had this, I also thought that the display was covered.

Answer 6

Usually everything is configured through the BIOS, where you can set the main display.