Czy mam "hardware MUX"?

[dedito]

1

Raczej nie masz, gdyż to dotyczyło wczesnych wersji hybrydowych grafik.
Tak przynajmniej opisuje to wiki Arch https://wiki.archlinux.org/index.php/hyb...Switching)

First Generation Hybrid Model (Basic Switching)
Note: Unless your notebook is from the last decade, it’s most likely using dynamic switching.

The first generation of notebooks with hybrid graphics follow an approach that involves a two graphic card setup with a hardware multiplexer (MUX). It allows power save and low-end 3D rendering by using an Integrated Graphics Processor (IGP) or a major power consumption with 3D rendering performance using a Dedicated/Discrete Graphics Processor (DGP). This model makes the user choose (at boot time or at login time) between the two power/graphics profiles and is almost fixed throughout the user session. The switch is done in a workflow similar to the following:

Turn off the display
Turn on the DGP
Switch the multiplexer
Turn off the IGP
Turn the display on again

This switch is somewhat rough and adds some blinks and black screens in laptops that could do it "on the fly". Later approaches made the transition a little more user-friendly.