GDM login screen wants to display on closed laptop screen (New to Fedora 43)

Hi all,

I’ve tried both rebasing from F42-F43 (Silverblue) as well as installing a fresh F43 install. but both exhibit the same issue, this was not present in F42.

I have a laptop (lid closed) connected to a Thunderbolt 4 dock with two external monitors. Beforehand, when I booted up Fedora the login screen would display on one of my external monitors.

Since rebasing / re-installing fresh, when I boot up my external monitors just display a grey screen. However, it’s obvious from moving my mouse far-left there’s a third screen being rendered. If I open my laptop I will see the login screen.

I can simply move my cursor far left and (blindly) type in my password and log in.

Once logged in I just have my two external monitors being used, and if I move my cursor far left it stops at the external display boundary (as expected).

I suspect a change in GDM between F42-F43 has changed the behaviour, even with the laptop lid closed it thinks it’s there and at login thinks I have a triple monitor setup.

Does anyone have any pointers on what to try? I’ve tried trying for force a config - sudo cp ~/.config/monitors.xml /var/lib/gdm/.config/monitors.xml and chown’ing that file for gdm:gdm but no luck

Thanks