Observed with nvpro-samples/vk_minimal_latest on Windows 10.
When swapchain for a window was never made with VK_PRESENT_MODE_FIFO_KHR, PresentMon reports window to have Composed: Copy with GPU GDI.
But if any swapchain was ever made with VK_PRESENT_MODE_FIFO_KHR (even if it’s not the mode for a currently used swapchain), PresentMon reports window to have proper(?) hardware paths with DXGI no matter the current mode and FPS dips down with mailbox (from over 3k to expected 330 with 3 frames in flight, double 165hz, reported Hardware: Independent Flip). With immediate after at least one FIFO: Hardware: Independent Flip.
Haven’t tested if presenting at least once is required for it to change.
Is this the intended behaviour or a driver bug?
GPU: Desktop 3060 12gb
Driver version: 572.168.0