Vulkan To Better Handle Variable Rate Displays / Adaptive-Sync In The Future
Keith for a while now has done contract work for Valve with Linux graphics infrastructure improvements around better supporting VR HMD hardware on the Linux desktop and more recently on display / refresh rate timing and ensure it works punctually.
While Linux has worked on improvements around vblank events, the DRI3 Present extension, and supporting OpenGL/Vulkan extensions like GLX_EXT_swap_control and GOOGLE_display_timing, Vulkan will ultimately provide a better standardized mean in the future.
Among the ideas being discussed in the Vulkan working group for improving display timing is properly supporting variable rate displays (i.e. Adaptive-Sync / FreeSync) and better handling display semantics. Those wanting to learn more can see Keith's slide deck from XDC2019 Montreal.