[Bug 795325] gstreamer-vaapi stutters heavily when rendering (some videos) to GLX

Thu Apr 19 10:06:42 UTC 2018

https://bugzilla.gnome.org/show_bug.cgi?id=795325

--- Comment #3 from Daniel van Vugt <daniel.van.vugt at canonical.com> ---
I'm starting to suspect this isn't a bug and may be just the fill rate limit
being exceeded. It's only a problem with GLX+4K+60Hz. If I play the same video
in FHD or 30Hz then it is smooth.

Interestingly, confirmed the same behaviour on a
 * Kaby Lake desktop
 * Kaby Lake laptop
 * Broadwell laptop

They all start to fail with GLX+4K+60Hz, but cope just fine if using EGL, or
FHD, or 30Hz. I guess GLX is just that bit heavier in rendering.

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