[Bug 28410] OpenGL vsync no longer working properly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28410

--- Comment #30 from Pierre Ossman <pierre-bugzilla at ossman.eu> 2010-07-07 12:38:09 PDT ---
(In reply to comment #28)
> 
> DRI2 didn't support any of the vsync related extensions until both the
> kernel vblank event support landed and support for the new DRI2
> protocol bits landed in the X server and DDX drivers.  So compat with
> older kernels (i.e. kernels w/o vblank event support) isn't really
> possible.

But couldn't there be a fallback to whatever mechanism was in place with the
initial interrupt support? OpenGL vsync was fine with Xorg 1.7.x and Fedora's
2.6.32 kernel.

Although I appreciate the lack of manpower, this whole business of having very
narrow compatibility windows between the different graphics components makes
testing very difficult. :/

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