Occasional System crashes while trying to shut Laptop down

[RPS]

I had a similar issue (not 100% same). It was caused by Nvidia drivers.
You can read my thread on it if you want to further diagnose:

System freezes when shutting down/logging out

After using the system for some time with dedicated nvidia GPU, there is a very high chance that the system will freeze when I try to shut it down or log off. Sometimes it freezes as soon as I click on shutdown or log off, other times it appears to be shutting down, but it never shuts down 100%, just like in this post: This does not happen with X11. This also does not happen if I boot into system with Nvidia GPU completely off (unload the drivers?) (using supergfxctl 4.0.5). I have used linux-…