Nvidia Prime doesn't appear in Nvidia Settings on Ubuntu 18.04?

Question

I saw a question over here, says that Nvidia Graphics jumps to 90º and fan goes at maximum speed. So, I want to use the Intel graphics integrated, but in Nvidia Settings (I use Ubuntu 18.04, Nvidia driver 390) doesn't appear the option to use Intel graphics. In Ubuntu 16.04 I don't know if it's the driver or what, but doesn't work this option (but appears in Nvidia Settings) because then Ubuntu doesn't allow go to your session. You try to enter but it returns to the gdm. Maybe in this version doesn't have this fail.

Answer 1

I saw the "fail". It's stupid but I didn't find the option until now.

We have to set in terminal sudo apt install nvidia-prime and then we'll have this option in Nvidia Settings.

Besides, I had to put in the GRUB settings noveau.runpm=-1 to use the Intel graphics.

Answer 2

1. Install Ubuntu 18.04. (update but don’t upgrade it.)

2. Disable nouveau

   printf '%s\n' 'blacklist nouveau' 'options nouveau modeset=0' 'alias nouveau off' | sudo tee /etc/modprobe.d/blacklist-nouveau.conf
   sudo update-initramfs -u
   

   and reboot.

3. Download driver from Nvidia. (In my case it was version 390.48 which worked.)

4. Stop X Server:

   telinit 3
   

5. Execute your .run install with root privileges.

6. Reboot and test driver installation by typing

   sudo apt-get install mesa-utils
   glxinfo | grep version
   

   If you see Nvidia there along with version then…

7. Install nvidia-prime:

   sudo apt-get install nvidia-prime
   

   and reboot.

8. Finally you can see the switch in nvidia-settings. (But it is better to switch by command.)

   prime-select "nvidia" or "intel"