I just started having this problem recently, but it will freeze when I am in the middle of coding and it seems to be happening more frequently.
I do tend to have a ton of tabs open in chrome while I am working, but I don't know where to start in seeing what the problem is here.
When it freezes, the mouse will still move but the screen is totally frozen and I have to do a hard reboot. I have tried hotkeys for terminals and other things, but nothing works
system-monitor
visible when it crashes to see if you are overloading CPU or RAM