It looks like your system is currently running switchable graphics; this means that your computer runs Intel graphics and Nvidia at same time. This type of computers do not use generic Intel drivers, they require special drivers from the computer manufacturer. I would highly recommend you contact your computer manufacturer for further assistance.
Done that with no success: [Inspiron 17R] How do I completely disable iGPU? - Laptop Video Forum - Laptop - Dell Community
I have tried all kinds of drivers: from laptop manufacturer, from Intel, from nVidia even the Beta drivers. None of them allow me to completely disable iGPU on Intel/nVidia combo and there is no such option in BIOS (there was one on Intel/AMD).
I have sent a request to replace my laptop with another one that has AMD graphics but in Estonia (where I am currently located) that is a long shot - our resellers tend to screw people over when replacing/returning/repairing things. Will never buy or advice my friends to buy a laptop with Intel or nVidia graphics, that is for sure.
More technical description of the problem: Intel's iGPU does not render output properly for 6-bit displays, which results in static dithering and colour banding artifacts. Given the fact that most laptops have 6-bit built-in displays, this problem must be very common, it makes me wonder why there is no scandal about this yet.
The iGPU is the primary video adapter which is i2c-associated/hardwired with the internal panel and the NVidia GPU only acts as an accelerator for certain power hungry applications therefore the NVidia GPU might be unable to directly access the internal panel. To clear on the dithering, most of internal panels don't have built-in image processing chipsets and the only input they offer is mostly 8-bit or 6-bit color depth depending on the GPU for dithering and scaling. The main GPU manufacturers use the following dithering techniques:
- NVidia > Dynamic Noise (less perceptible)
- ATI/AMD > Dynamic 45/90 degree bars
- Intel > Static 90 degree bars (most perceptible)
Given my experience with Intel support is better to avoid their hardware the next time. A few years ago I discovered a glitch with Intel Wireless adapters that has continued unfixed in later products, over 100 people confirmed to be having the issue and Intel's immediate response was to discontinue the product's support moving it to legacy and of course never fixing the issue.