In an Laptop Intel igpu and AMD dGpu work in OSx Catalina? Or Just iGpu works?

Is Intel igpu and AMD dGpu work in OSx Catalina? Or just igpu works? Is an Broadwell i7 5600u+r7 m260x (Opal Pro, based in Oland, Gcn 1.0). Laptop is an Elitebook 840 G2. Works and boot with igpu only, dgpu is not recognized. Where I find any tutorial to make this work?

submitted by /u/leonardcoutinho
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