Comment 55 for bug 1043518

@wxl you've provided a lot of logs there, but have you actually looked at them youself? I haven't read all the posts here, but it is fairly clear to me that you have a different problem to the original poster. But, just to be sure, have you tried turning off the splash screen? On a PowerPC live/desktop ISO you do this by selecting the nosplash option at yaboot.

Your problem is the nouveau xorg driver doesn't detect your device. Setting up an xorg.conf may solve this. Otherwise you will have to load a legacy framebuffer and use the fbdev xorg driver. The openfirmware framebuffer is limited to 16 colours (a lot less than 8 bit), and there is no getting around that.