Comment # 10 on bug 917411 from macias -

I am sorry, but I have to reopen it, because the system keeps freezing. What I
found out so far:
* the old kernel also freezes
* journalctl does not show any error or trace of problem, simply there is no
messages during "freeze" period (until hard reset, reboot is recorded, but this
message could come from next boot)

> For example, if the
> machine doesn't respond to network ping, it's likely a complete
> freeze.

Ok, I do it next time.

> and the remote login still works.  

Errm, I would not like to open remote loging, because the freeze is not that
often.

> In the case of complete freeze, usually it's a kernel panic, and
> the kernel always tries to leave some dying messages. 

Where? journalctl does not show anything related.