https://bugs.freedesktop.org/show_bug.cgi?id=109171
--- Comment #2 from Alex Deucher alexdeucher@gmail.com --- Please attach your xorg log and dmesg output. Note that using the dGPU involves extra copies to copy the rendered frame to the integrated GPU for display so there is additional overhead. You need a relatively advanced 3D game to see an advantage on the dGPU as you have to overcome the overhead of the additional copies.