This question is an exact duplicate of:

I have this problem-after last update of Kali Linux I've had black screen problem and fix it by downloading bumblebee but now I can't run Kali on dual monitors. Before the update screens were automatically seen by Kali. How can I fix this problem? graphic card is Nvidia GtX 970 I run Kali on my PC as an HDD install.

marked as duplicate by user34720, Romeo Ninov, jimmij, A.B, Mr Shunz Feb 5 at 14:59

This question was marked as an exact duplicate of an existing question.