[Development] Late API addition in QScreen for 5.0

Fredrik Höglund fredrik at kde.org
Tue May 8 20:48:59 CEST 2012

On Monday 07 May 2012, Samuel Rødal wrote:
> On 05/04/2012 04:22 PM, ext Samuel Rødal wrote:
> > As for the open source drivers I don't know of any reliable way of
> > enabling vsync. There's the GLX_SGI_video_sync extension which is
> > supposed to give a uniform way to sync rendering regardless of graphics
> > driver, but when I've tried it I've gotten the same tearing in a single
> > location issue as described above.
> Actually, I take that back, it seems at least Intel's Mesa DRI drivers
> do proper vsync by default, which is great news.

The radeon driver also syncs to vblank by default. Technically the code is
in the DDX drivers, not the Mesa drivers.

I believe the nouveau driver also supports syncing to vblank, but I don't
know if the DRM support has landed in Linus's tree yet.


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