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.
When you copy over your monitor config, are you correcting the ownership/permissions?
The little scriptlet I made to combat a previous nvidia/wayland multi-monitor headache boils down to:
sudo cp $HOME/.config/monitors.xml /var/lib/gdm/.config/ sudo chown gdm:gdm /var/lib/gdm/.config/monitors.xmlMaybe double check if GDM is ignoring wayland as well, I’ve definitely had that happen in the past too.
Just checked the ownership of the monitor config, it was
gdm:root, so I changed the ownership togdm:gdmand rebooted. Still facing the same issue.Didn’t see any error messages in the logs about not being able to load wayland, but just to confirm, I ran
loginctl show-session {gdm session id} -p Typewhich returnsType=wayland, so it’s definitely running under wayland. I have an AMD GPU though so I wouldn’t expect there to be any problems there.Not seeing anything else weird in the logs that are jumping out as strange to me either, so a bit at a loss here. Any other suggestions?