Graphics card crashing when using serial plotter

Hey guys, wondering if anyone ever had this happening:

I have a little detctor device, and during development I use the serial plotter to check the signal. My PC crashes from time to time when I use the serial monitor for a random amount of time (like one day it happends after 10 seconds, another day it doesnt happen for 10 minutes). After digging in the log's I noticed it was the graphics card which crashed. When using a lower baudrate than 115200 it doesn't seem to happen.

Weird stuff. Likely the graphics card is faulty, but I can't seem to find anything wrong with it, and it runs smoothly on every stresstest I throw at it. I have no clue what the exact deal is with the serial plotter that seems to annoy my graphics card enough to crash.

Anyone ever experience this?

some info:
Using Arduino uno Rev3
Lubuntu 16.04, running Arduino 1.8.12

edit: doing some testing and it seems to happen at multi baudrates, although it seems to be take longer in lower rates

If it was windows I would say a graphics card driver issue.
Other aspects to consider are voltage fluctuations on the computer PSU and static build ups.
Using the serial monitor may just be an indicator of the above.

Have a latest ubuntu loaded machine here which on occasion balks with graphics issues but has played nice since I re-seated the card and gave the insides a good clean out.