So, for context, I have an HDMI dummy plug that is disabled most of the time, but enabled through command-line to use as a virtual display for game streaming with Sunshine.

In GNOME settings, the display is disabled, and that works just fine. I can enable/disable it at will whenever I want to stream games using the new gdctl utility added in GNOME 48.

I want this “monitor” to be disabled in GDM as well since it keeps trying to use the dummy plug as the default display and I can’t see any of the UI elements and have to type my password in blindly. I’ve copied over my monitor config from /home/user/.config/monitors.xml to /var/lib/gdm/.config/monitors.xml as per the Arch Wiki’s recommendations, but when I log out/reboot, nothing changes on GDM. It still tries to show the password entry UI on the dummy plug and my actual display just shows a gray screen.

I know the configs are different for X11 and wayland, but both GDM and GNOME are running under wayland, so that shouldn’t be the issue.

Any help would be appreciated.

I use Arch btw.