I've installed loki a while ago and I had some trouble with it like not being able to shutdown, restart, ... I've been able to solve those problems but there are still some huge ones that persist such as black screen after suspend/closing the lid and after sometime using loki it freezes for some reason and I'm not able to do anything (not even Ctrl + Alt + F1) and I have to restart by pressing the power button ..
Intel(R) Core(TM) i5-6440HQ CPU @ 2.60GHz
Nvidia GTX 950M 2GB
Can someone tell me what's wrong? Thank you