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+# Parked for later milestones2
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+Issues found while building, with the milestone that owns them.4
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+## M76
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+- vkcube shows a black window for about half a second at startup since early import, first-buffer holds and explicit sync landed. A spans log of a launch tells which.8
+- Every 1024th queue submit on NVIDIA stalls for 2.5 to 15 ms, one dropped frame every 6.2 s at 165 Hz. See research/nvidia.md.9
+- First-time dmabuf imports (15 to 27 ms each on NVIDIA) and direct scanout setup on fullscreen still land on the main thread and cost about ten frames per transition.