So I was browsing with the laptop on my lap when it suddenly rebooted after I tilted it slightly forward. I logged in again and after doing something similar the same thing happened.
So it is very much reproducible, I took a video but cannot attach it here.
I did not see anything in the journal that would be meaningful but can provide any data that may be helpful.
From Gnome-Firmware it looks like all software is up-to-date. I have the latest Ryzen 7 with 32GB, 4Tb WD-Black SSD and running box-standard Fedora 39, just now updated to the latest packages.
Please help me figure out what the issue is and what I can test!
Edit: I just verified that this is also happening in the BIOS. A little shake and boom, it reboots. So it seems to be a hardware/firmware issue. No wonder I don’t see anything in the journal or dmesg…