I have a Proxmox setup and am having an issue with it locking up every so often. Sometimes is can be weeks, other times just a few days. The GUI and local terminal (still displaying the login screen) become unresponsive and any containers or VMs stop working. A hard reset is the only way to get it going again. Some time ago when it locked up, the terminal screen was full of lines "NMI watchdog: BUG: soft lockup - CPUx stuck for 22s!" but these days it just displays the login text. I do keep Proxmox and the VMs updated on a fairly regular basis. The current Proxmox version is 5.4-5 Keep in mind that I have limited knowledge of VMs and a "bit more than basic" understanding of Linux. What logs should I be checking and what info is required to help me work out what is going wrong?