AMD64, NVIDIA & composite

[Alan Cox]

On Iau, 2004-09-09 at 18:51, Janne Ojaniemi wrote: 
>  2. People have demonstrated how cool it looks to move a transparent windows 
> over a video being played back. But that doesn't work on my system. The video 
> is not displayed through the transparent window. Also, the topmost window 
> casts a _blue_ shadow on the video 

Thats "the Xv problem". The video card is hardware mixing the scaled
video and the main frame buffer. As a result of this the compositor ends
up compositing the chroma-key not the video image.

Probably the compositing engine should be smarter and at least not merge
bright blue here.