[Bug 99418] DRI3 Stuttering while scrolling in Chromium/Chrome with VBLANK off

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Comment # 17 on bug 99418 from
(In reply to lei.pero from comment #14)
> It does happen on modesetting driver regardless of DRI version, strange.

The modesetting driver doesn't allow disabling DRI3 on the server side. You can
always disable it on the client side though with the environment variable
LIBGL_DRI3_DISABLE=1 .

The fps graph shows the same framerate in both videos, so the problem seems
rather about animation timing. It might be related to the fact that DRI3 allows
triple buffering, and might be at least partially an application issue. It
would be interesting though if it also happens with a non-AMD GPU.

BTW, is there any particular reason why you're disabling sync-to-vblank? It is
the intended mechanism for smooth animation...


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