If a video card is already in use to display a desktop, does this mean it can or cannot be used by OpenCV and/or CUDA?
I suspect the GPU is a all-or-nothing dedicated resource, where it can either be used to display the operating system desktop, or be used for image processing (ML, OpenCV, etc) but probably cannot multitask both like a CPU can multitask between different applications.
In case it matters, my OS is Ubuntu Linux.