Intel i915GM (xf86-video-intel modesetting) Tearing

kofboy kofboy at
Wed Aug 1 00:53:36 PDT 2007


> > >  it appears
> > > there is nothing in the XV code that would synchronise to the vertical
> > > blanking period for display (overlay?) updates?
> > 
> > Right, the textured video adaptor doesn't delay for vsync; that's
> > because we don't have the infrastructure in place to do this without
> > spinning inside the driver, which wastes a lot of CPU time.
> Thanks for confirming this. I certainly had issues with CPU spinning when
> using double buffering (in the previous i810 driver) it would often end up
> eating all the CPU time. In the end I hacked the xine video out loop and put
> in a glx wait which seemed to fix things.

would you please post your patch for xine video out?

i have searched the whole list, and find you are the only one who fixed
tearing issues useing XV for intel gfx-card without overlay.


        kofboy at

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