Going back to the beginning of this year there’s been talk of NVIDIA looking at Optimus support for Linux and in August they confirmed they were working on NVIDIA Optimus Linux support. As part of their Optimus Linux implementation they want to use DMA-BUF for the multi-GPU interactions just like the open-source drivers, so that they can all work together. However, kernel developers continue to reject this notion.
Read more at Phoronix
