This problem has been bothering me for months. I have a HP Envy Dv6 laptop, in which I installed Kali Linux. It has a dual gpu system with integrated graphics (Intel HD 4000) and dedicated GPU (Nvidia GeForce GTX635M).
I want to install Nvidia proprietary driver, so finally hashcat will see it and the screen tearing issue when using the os will be fixed. I tried to follow the official kali docs guide, which brought me to a frozen black screen with blinking "" on it after reboot. I found this guide on Kali forums, which I tried to follow step by step even a after a fresh new kali installation. No way, my pc still reboots to a blinking "" screen, from which I'm able to access my, system trough ctrl+alt+f2. From there, the only way to get back to a desktop environment is to purge all nvidia files.
I'm thinking the problem could be the erc/X11/xorg.conf file not configured well, because I managed to make it work from there just one time years ago, but I don't remember what I did.
Also, my idea is that the computer sees the graphic card, installs it successfully but then doesn't know in which screen to output it, because it gets confused by the presence of Intel card.
Anyone has idea about what can I do to troubleshoot/fix my problem? If you want screenshot, logs, pictures just ask, I'll provide them immediately.