It happened again.
I have attached the output of
# journalctl -b -0
as well as the output of:
# dmesg | grep fail
There is 1 error in the first one (about XCB error) and 3 errors (about NMI watchdog, acpi and vboxsf) in the second one.
Not sure, but I think the culprit is vboxsf which is related to the Guest Additions. I’ve done some research and I found these tickets on virtualbox.org:
although I don’t use 3D option.
What can I do next?
I shoud have checked if a process is causing the freeze. Actually the last freeze happened after I opened postman. But again not sure if this was really the culprit…