[Xorg-driver-geode] Problems with VBLANK

Marius Selach marius.selach at gmail.com
Sat Feb 21 20:41:56 PST 2009


Hello,

it seams I got the same problem like Constantin. I build a multimedia system
based on an AMD Geode. In my case a Geode LX 800. I also connected an LCD TV
to view movies with it. The movies are playing very well, but I get tearing
effects on movements. I think this is because the VGA output is not
vsynced/blanked to the display. During my search I found something in the
xserver-xorg-video-amd documentation about VBI an vsync. But these options
seams not to be valid for  xserver-xorg-video-geode.

So the question, is it possible to add vsync/blanking features for VGA into
the driver? Or do I just missing something in my xorg config?

@Constantin:
I also can't set my resolution to 1360x786 but my LCD TV does a great job on
interpolating and bluring the image. With a normal viewing distance you
should see a big difference.

P.S.: I made a photo of the effect. I think there should be no doubt that
this is a classical tearing effect.
My Photo:
http://img113.imageshack.us/img113/7431/tearingorshuttereffect.jpg

classical tearing from a video game:
http://www.tweakguides.com/images/GGDSG_19.jpg



Best regards from Switzerland

Marius Selach
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