Black screen during upgrade, then getting no graphics

Hello!
I have a laptop with arch. I have gnome installed but I use GDM to start i3wm.
When I upgraded today (with pacman -Syu) the screen went black mid-upgrade. Then it briefly flashed now and then, showing the desktop. It also didn't respond to anything, including trying to change to a text based terminal. I gave it some minutes and then force-switched it off and restarted. Then when booting, the boot loading text stops at "Started User Manager for UID 120" and then it's stuck there. I can however change to a text based terminal.
What I tried:
I tried starting x with startx in a text based terminal. I got X started with the basic windows. Then I tried using journalctl to display the info about gdm, and got this:
Starting GNOME display manager...
Started GNOME display manager.
Child process -325 was already dead.
Child process 317 was already dead.
Unable to kill session worker process
Child process -<another PID> was already dead.
Child process <another PID> was already dead.
---This repeats every minute with different PIDs constantly---
Any ideas on how to debug/fix?
Help appreciated, thanks.

What is the output of:
grep EE /var/log/Xorg.0.log
It would probably be a good idea to use `sprunge` or similar to upload the entire contents of that log and post the link here.
https://wiki.archlinux.org/index.php/Li … in_clients

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Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
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Black screen during Windows install

Hello,
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