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PRIME Synchronization & Double Buffering Land In The X.Org Server
Alex Goins of NVIDIA has been working on this big PRIME synchronization project for a while now to help reduce tearing in such configurations. That work has gone through many revisions over the months but as of this afternoon it's landed in xserver Git.
There is the support for PRIME synchronization and double buffering when both drivers support the necessary functions. With this work today are also the modesetting DDX driver changes for being able to support it. NVIDIA is expected to soon release a proprietary driver update to support the needed functionality there too.