Hi andy,
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I noticed that when running live ISO from the http://23p.diskohq.org/, the console is first turn to FB mode then go into the X windows, so I assume that the demo is running on the X-backend.
yes, that's correct.
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So is it possible to use DirectFB backend to do the same thing, like play video/flash?
yes.
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One more thing for the flash, I was running on the VMware virtual machine, the flash seems freezing after showing the game, no matter what I clicked nothing happened.
We use the swfdec library to play flash movies and this library is unstable. To play the Flash game of the 23p-Disko demo you have to press the "reset" button at first. After that you can play the flash game.
regards
guido