Hello, after a few days without problems, I got a complete freeze today. The laptop was really stuck, not ssh access was possible. In the mean time I managed to install the latest LinuxMint 19 Cinnamon, and also reinstalled the latest kernel 4.18.0-041800-generic from Ubuntu. I have no info in any log file or any core available. The computer just froze. What can I do to collect useful data the next time it freezes? Thanks