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.
Very well said. Thank you very much for your help. I wouldn’t have known to check the ownership issues or if GDM were properly running Wayland were it not for your help. I’ll reach out to the GNOME devs on the relevant repositories and see if they might be able to point me in the right direction. Thank you for your time and expertise.