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[Ryan Oram <755841@xxxxxxxxxxxxxxxxxx>]

(In reply to comment #97)
> (In reply to comment #96)
> > If you have an unredirected fullscreen DRI2 application, then it will use
> > pageflipping to update the scanout upon a SwapBuffers. So something as simple
> > as 'mplayer -fs -vo gl' should be enough to achieve tear-free playback on most
> > DE (you may have to tweak a few compositor settings if using one though).
> Is this also true when you use multiple monitors (xrandr output follows)?
> Because I use mplayer -fs -vo gl with xf86-video-intel
> 8066bc33d78e78ce7c13833b08a7daaea2f3ed22 (AccelMethod SNA, TearFree not set)
> and I do notice tearing.

Same with UXA and vlc with glx output. No compositor here. I can clearly
see tearing when I connect the laptop to an external monitor to watch
movies.

I think there's two bugs being discussed here. One is that compositors
that don't unredirect fullscreen windows may give you tearing. Another
is that even without using a compositor, and even if you render using
OpenGL, you can still get tearing.

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https://bugs.launchpad.net/bugs/755841

Title:
  [sandybridge] Graphics tearing when playing video

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