I'm using a ThinkPad X11. I hit sudo apt update && sudo apt upgrade && sudo apt autoremove after a month off - that was stupid, I know. I don't really remember the Ubuntu version it was running.
Upon rebooting, the laptop briefly goes to the "Lenovo + Ubuntu logo" screen, then the white screen with the "Oh no! Something has gone wrong. A problem has occurred and the system can't recover. Please contact a system administrator" message appears.
I have found a lot of solutions online, but everyone seems to be able to invoke a terminal. I have tried every conceivable key combination. Only Ctrl+Fn+Alt+F6 does anything at all, but it just takes me to a black screen with a white cursor. Pressing key combinations like Ctrl+c/z etc. on this black screen does not do anything.
Is there anything I can do from here to recover?
Edit: If I start spamming Ctrl+Fn+Alt+F6 before the white screen appears, I can briefly see this log:


