[Bug 28771] Vsync always on

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28771

--- Comment #10 from Toni Spets <toni.spets at iki.fi> 2010-07-17 22:36:22 PDT ---
(In reply to comment #9)
> (In reply to comment #8)
> > I can confirm that setting vblank_mode=0 in drirc doesn't work here either.
> > 
> > Can't reproduce the other problem though, window or fullscreen doesn't make a
> > difference.
> 
> Maybe the wait for vline type vsync I get is r600 specific.

I can also confirm .drirc gets ignored but env vblank_mode works.

To disable vsync completely you currently (and before) need a DDX hack along
with vblank_mode=0.

With this patch interestingly glxgears goes from ~1400 fps to ~2100 fps and
Quake 2 can run uncapped.

What is the real solution and why is this patch needed in DDX?