Enabling sleep mode even when the Intel UHD 620 graphics is disabled

Hello everyone!!
I want to disable the Intel UHD 620 graphics on my laptop.
But as soon as I do so, the sleep option gets disabled from the system.

There is a long painful story behind why I don't want to re-enable the graphics card.

Meanwhile, I want to ask if It is possible to get the sleep option back on the laptop without enabling the graphics.

Thank you

Dude said:

Did you use the latest driver for the Igpu from the dell site? Lots of users have that sleep problem. What model is your laptop?

I installed latest driver from dell website
I also updated bios.
Some suggested me to disable SD card, I did so
I installed many versions of Linux but none solved my problem.

So I just want to disable my graphics driver. I have already wasted 10 months trying to fix this problem.

The laptop is Inspiron 7373 2in1