Desktop Duplication API & switchable graphics
问题 The problem : calling IDXGIOutput1::DuplicateOutput method returns DXGI_ERROR_UNSUPPORTED when you run an application using discrete graphics controller on a machine with switchable graphics. This answer shed some light on the issue. In short, the discrete graphics renders only a part of the screen and sends the data to the framebuffer of the intergrated graphics controller -- in other words all output always goes through the integrated graphics controller. It seems that this is why