compiz startup error

[William Xu <william.xwl@gmail.com>]

Hi all, 

I'm trying to get compiz work on my ibook G4(debian unstable), following
http://wiki.debian.org/Compiz.

Now when i start compiz, it complains, 

,----[ error ]
| $ compiz --replace
| libGL warning: 3D driver claims to not support visual 0x4b
| /usr/bin/compiz.real: Another window manager is already running on screen: 0
| /usr/bin/compiz.real: No manageable screens found on display :0
| $ 
`----

Any idea on this?

-- 
William

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