I have recently installed Ubuntu 18.04.2 on my Laptop and am experiencing regular freezing, where all windows and actions freeze (can't type, press buttons, etc.) but I can (sometimes) still move my mouse pointer (but even then, it can't click anything).
Once it freezes the only thing I can do is hold the power button down and restart it. The freezing seems completely random, and has happened when doing multiple different tasks.
You can see my lshw output here https://privatebin.net/?2f77830db7565fdd#W0cP/pE0ZfEvOTYW2QDSzDZR0GfU9dDcvUz8f6CKwTc=
I have tried looking through syslog, kern.log and also looked in /var/crash (which contained nothing) and could not see anything that stood out to me (although i'm new to this, so I may be missing something obvious).
The only thing I can think of is that it has a Ryzen CPU, but even then it seems like a lot of Ryzen issues were fixed with Ubuntu 18.
I previously had the latest Kubuntu installed and that worked fine (it did occasional freeze, but it was much, much less frequently).
Whats my next step? Is there anything I can do to either find out why its crashing, or to stop it crashing?