I sat at my computer to resume working, woke it up from suspend (I never reboot
unless I have to); the previous time I had used everything was working fine.

I found it in the following state:

- I tried to open a web page in Chrome and it wouldn't load but also wouldn't
show any signs of being loading. At first I thought only Chrome was hung
- Clicking on application icons of already open applications in the task
manager would fail to give focus to them, as if I wasn't even clicking
- I could switch focus with alt+tab
- in a Terminal, top didn't show any high CPU usage
- most applications weren't responding. For example, clicking "get messages" in
Thunderbird would do nothing
- for a moment I thought the mouse wasn't responding, but it did respond to
some events (e.g. selecting text by clicking and dragging; right-click context
menu in most applications would show up, but not right-clicking on the task
manager)
- in a Terminal, I tried to kill some Google Chrome processes ("kill -9 12345"
where 12345 was the PID) and either one of the following would happen: (1) the
process was still listed, but instead of the full executable path it would read
only "[chrome]" and it was listed as "defunct" whatever that means, or (2)
nothing at all, that is, the process would keep being listed despite the kill
command hadn't given any error
- I was unable to launch Firefox

and several more instances of nonsensical behavior.

I restarted, and the reboot got stuck forever with the spinning icon spinning
on top of the very first splash screen (the one with the hardware vendor's
logo, i.e. Lenovo). After several minutes waiting I force-powered it down. For
a moment I thought OpenSUSE had once more bricked my computer, but after
powering it up again, it booted succesfully and everything was working again.

This did NOT happen after installing software updates.