I have ubuntu 18.04 installed on my system. I am getting the error:

 $ 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 following the link: install latest proprietary driver

$ hwinfo --gfxcard --short

graphics card:
Intel VGA compatible controller

Primary display adapter: #20

@lc2530hz:~$ sudo lshw -C display

*-display
description: VGA compatible controller product: Intel Corporation vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 00 width: 64 bits clock: 33MHz capabilities: pciexpress msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:144 memory:8d000000-8dffffff memory:90000000-9fffffff ioport:4000(size=64) memory:c0000-dffff

Then it asks for pressing the windows key. The remaining steps are:

pressing Super Key-→update manager-→Settings-→Additional Drivers, I am getting following screen:

Somebody please guide me what should I do now?

Zulfi.

== The system information:

$ sudo dmidecode -t 1 [sudo] password for zulfi:

dmidecode 3.1 Getting SMBIOS data from sysfs. SMBIOS 3.1.1 present.

Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: Notebook Product Name: N8xxEZ
Version: Not Applicable Serial Number: Not Applicable UUID: 58315B0C-1064-4E3D-A328-E93B5ACFB7F6 Wake-up Type: Power Switch SKU Number: Not Applicable Family: Not Applicable