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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Date: Tue, 18 Oct 2005 07:44:26 +1000
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Cc: linuxppc-dev@ozlabs.org
Subject: Re: 2.6.13 ati (ibook) frambuffer problem
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> I selected
> 
> CONFIG_FB
> CONFIG_FB_RADEON
> CONFIG_FB_RADEON_I2C
> CONFIG_BACKLIGHT_LCD_SUPPORT
> FRAMEBUFFER_CONSOLE
> 
> The 2.6.12 version worked. Would it make sense to post the complete
> .config?

Nope. What may help is a bit more debugging. For example, does the
kernel actually boots if you add "video=ofonly" to the kernel command
line.

Next would be to hack kernel/printk.c to call btext_drawstring() on the
printk buffer, though you'd have to add a global variable "foo" that you
test before doing that, and only set it to 1 from pmac_setup_arch() in
arch/ppc/platforms/pmac_setup.c

Ben.