External monitor turns off when I close the lid of the laptop

[raffaem]

I have a laptop and I use an external monitor.

I have NVIDIA proprietary drivers, which I was able to work with following this guide.

At first the external monitor was blank, but then I followed this guide and added:

WLR_DRM_DEVICES=/dev/dri/card1

to my wrapped.

Now only my external monitor works, which is exactly what I want.

The problem is that when I close the lid of the laptop, also the external monitor goes blank, and I don't want that (of course).

There must be some hook left behind by GNOME that turns off the main monitor when the lid is closed, or something?

Any idea?

[raffaem]

In /etc/systemd/logind.conf, change HandleLidSwitch from suspend to ignore (of course uncomment the line first by removing the # in front of it).