compiz team mailing list archive

[Ryan Oram <755841@xxxxxxxxxxxxxxxxxx>]

(In reply to comment #87)
> (In reply to comment #85)
> > I can still see tearing with GL rendering. It's much less noticeable, but it's
> > there. I can see it clearly when I'm watching basketball games in a 1080p TV
> > (using HDMI), specially during the fastbreak, when the camera pans quickly. But
> > yea, it's much better than X11, Xv or anything like that. Is this expected? I
> > tested both with mplayer and VLC (glx output).
> > 
> You might be seeing the effect as shown in my attachment
> (https://bugs.freedesktop.org/attachment.cgi?id=47585), which according to
> daniel vetter is "probably unfixable". I think this is because possibly that is
> actually an artifact of capturing the screenshot. However something else which
> happens for me is that in the vertical-bars video the bars don't move smoothly
> across the screen. I don't know how to really explain it, but it is as if my
> screen has a really slow switching time, so that the front of the bars (as they
> move) lights up, while the rear fades out. However this fading is not gradual,
> but seems to happen with a lot of 'blinking'. I'm not sure what is causing this
> yet, but I think it might be some artifact of the screen (seems to happen with
> some bars painted in the gimp, too), it looks quite weird.
> Anyway make sure it's none of that, take a picture with a (decent) camera.

Note though that I'm seeing this in video, I'm not trying to take
screenshots. Just to be clear.

> > I can't even test VAAPI. VLC supports it, but when I enable it, I get 100% CPU
> > usage and less than 1 FPS for some reason. There's the mplayer patches for
> > VAAPI support, but it seems in very bad shape. Is there a test program for
> > VAAPI?
> You can try the mplayer-vaapi branch at git://gitorious.org/vaapi/mplayer.git ,
> which is maintained by Gwenole Beauchesne, who also works on intel's vaapi
> support. The mplayer version it is based on is quite old, and it is based on
> the original mplayer (not mplayer2), but it works fine nonetheless.

I'll check that out, thanks.

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

Title:
  [sandybridge] Graphics tearing when playing video

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