This broke my GDM

[budius]

I also asked this on r/ubuntu, so I'll just copy paste from there.

"
I saw (I think it was here or maybe on r/gnome) about a Flatpak to customize the GDM/login/greeter. I installed it, took a look, and decided I was not very interested and just uninstalled it. It's this here https://flathub.org/apps/details/io.github.realmazharhussain.GdmSettings . I believe I didn't change anything, BUT....

Now my PC boots and goes to a blinking cursor 😫😩😣😖

I can press alt+F2, the tty session shows up, I can login there and the system is fully functional from the command line, just something on that app broke to gdm3.

I can check the /etc/gdm3 files with nano, use sudo and I execute the gdm3 binary installed. Attempts to use xinit or xstart lead to another tty session stuck with a blinking cursor or error messages.

Executing 'systemctl status gdm' I get: Gdm': Child process -2185 was already dead GdmDisplay: Session never registered Gdm-launch-environmemt GLib-Gobject: g_object_unref: assertion 'G_IS_OBJECT (object)' failed

The system is pretty default, just Ubuntu, Gnome, maybe 3 plugins. Ubuntu 22.10 kernel 5.19.0-35 gdm3 --version is 43.0

(Of course cannot ctrl+c ctrl-v all the messages due to tty only)

Now the question: how can I reset the configuration files for it, or at least look up the default files to compare and copy?

Thank!
"

[budius]

As just my luck... It was completely unrelated to this application 😞. Sorry
I spend hours trying to see what this changed the settings for nothing.
If the owner of the repo wants, feel free to delete this thread as not related.

I had earlier installed wireguard (apt install wireguard) and I'm not sure what's up, but it seems that it bring a different kernel, without the proper headers and modules recompilation, I'm not sure super, that's not my area of expertise. But long story short... boot the computer holding shift, go to grub, run the previous kernel, remove the newer kernel, remove wireguard, remove nvidia, re-install nvidia, recompile dpkg-reconfigure nvidia-dkms- for good measure and it's all working fine.

Now gotta find out where to report this. It's the second time that installing Wireguard messes-up my installation.