I’m using an XPS 13 9350 with 16GB of RAM and the Intel Graphics 540. I am using Fedora KDE spin. When I am using computer, either randomly or when I start a program, my computer will slow down and quickly fully freeze. In this state, the only thing I can do is shut it down. Is there any way to make it so that a program is killed, or something else that doesn’t fully stop my system?
I had a similar issue, running Mint.
It took me a while, but I tracked it to a buggy firmware on the nvme SSD (WD black 4000). Once I updated the firmware, all the stability issues disappeared.
If your system in under heavy disk load when the issue appears, take a look at your SSD firmware.