The problem is that the secondary buffer is being written to before it 
has been completely removed from the screen. The video driver should be 
waiting for the blanking interval before returning as that OMAP video 
interface has shadow registers that only take effect during the blanking 
period. You'll need to add wait logic in the pan_display to wait for the 
blanking interval.

Harishkumar V wrote:
>
> Hi,
>
> I am also trying to run android on 640x430 resolution using s-video on 
> my tv in ntsc mode in beagle board.
> I am also facing the same flickering problems.
>
> the framebuffer driver is perfect.
> i am able to check with test applications.
>
> my yres is 430 and yres.virtual is 860.
>
> i checked in the logcat message, there is no error found like page 
> flipping not available.
>
> how to overcome this.
>
> if possible, i attach the android booting video which is flickering.
>
> Thanks and Regards,
> HarishKumar.V
>
> On Thu, Apr 30, 2009 at 10:39 PM, Elvis Dowson <[email protected] 
> <mailto:[email protected]>> wrote:
>
>     Hi,
>           Sorry for the delayed response. I was deep in trying to fix
>     my android touchscreen implementation. I'm not familiar with the
>     board that you have. Perhaps, if you could load a video of the
>     flicker on youtube and send us the link, perhaps we can try to see
>     what is causing it.
>
>     Best regards,
>
>     Elvis
>
>
>
>
>
>
> >


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