At first glance I though it was an Overclocking problem because I oc my hardware just slightly. But no even with no OCing, zero, nada... since 5.1.18 Unigine benchmark crashes. It is really unstable 90% of the times it will crash when it's about to display the final results, on 5.1.20 is even worse and it gets crazy because fps drop really hard. If you are really luck it will finish. I have tried 5.1.18/19 and 20. 5.0.20 doesn't not have this bug. I will try to investigate further to at least know which is the precise point release when this bug was introduced.
This is with Linux Mint (Ubuntu 18.04.2 LTS really) I forgot to mention that this is with the liquorix kernel, maybe I should try with vanilla kernel first.
With ubuntu ppa vanilla kernel this happens as well.
I should be more precise it doesn't crash really it hard locks the pc completely only the reset button will fix the problem.
interesting, kernel 5.2.3 doesn't hard lock the PC, but fps drop, abnormally (like with 5.1.20) but when looking at the final results, it's not that bad, about 5% performance hit.
unfortunately the bug was introduced in 5.1.0 so this is going to take thousands of commits, I'll do my best.
it doesn't happen with 4.19.61 lts. I think it will be easier to check all the 5.1 rc and check when this was introduced.
What hardware?
I'm gonna close this because the regression on the 5.2 are fixed now performs even better than the 5.1 branch. And fixing the 5.1 branch makes no sense because it has reached EOL.