Nvidia-driver-435 should be installed in my Ubuntu 19.04 [url][/url]laptop through Software&Updates. However, it may not be functioning since the graphic card might not be detected. See the following command :
$ nvidia-smi
NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
I am assuring this might be the solution to the problem. However, my laptop won’t be able to boot Ubuntu after I disable secure boot. I am finding a way to tackle this problem. Thanks by the way
The easiest way to have Ubuntu+nvidia driver+secure boot enabled is to reinstall Ubuntu and during the installation, choose to “install third-party software”->nvidia driver. This will enable and guide you through the module signing setup, needed for secure boot.