It wasn't quite the same thing that happened, but in any case, I just got a +wall message saying there was a "soft lockup" (I have no idea what that means), so I figured I'd wait a couple minutes and then reboot the system, and then do the journalctl thing. So, here's the record of the previous boot.
** Attachment added: "prevboot-2021-09-15.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939966/+attachment/5525485/+files/prevboot-2021-09-15.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939966 Title: Random system stops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939966/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
