Are there any recent systems that do that? Nvidia’s description of the mechanism says that their early take on the concept, ‘hybrid graphics’/‘switchable graphics’ left the two systems essentially independent; but at the cost of having to actually route and switch a bunch of high bandwidth video interfaces between the integrated and discrete GPUs; which wasn’t a big hit; so now they keep the IGP alive all the time, hardwired to the outputs; and the Nvidia chip DMAs frames into its brain if it wants to display something; but has no actual video outs of its own.
Did some vendors retain the old ways because the compatibility of the fancy software shim is…perhaps less optimal…than the marketing documents suggest?
