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How to detect the vertical retrace under Linux?

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joyceusa

joyceusa

Programmer
Dec 31, 2002
3
US
Does anyone konw how to detect the vertical retrace sync under Linux?

I need to make a very smooth crawl on the screen (may show on TV later), the effect of Banner in KDE screensaver is pretty close, but it is not smooth enought. From some material, I know that the way to avoid the tearing is synching with the retrace.

Does anyone know how to dectect the vertical retrace under Linux? I am using RedHat 7.3 right now.

 
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