https://bugs.freedesktop.org/show_bug.cgi?id=94903
--- Comment #4 from John Galt johngaltfirstrun@gmail.com --- I noticed something interesting: mpv was getting a reported refresh rate of 60.0hz in weston which is incorrect, actual display refresh rate is 59.951hz (if I don't force it to 60.0hz as a workaround). In X, it gets the correct refresh rate.
I was about to override the reported refresh rate to 59.951hz for mpv and play a video without stutters, and without changing monitor's refresh rate.
weston-presentation-shm is also consistent with no vblank skips during playback this way (at least with mpv playback). I suspect other applications are also getting an incorrect reported refresh rate.