G3 iBook LCD brightness in X under kernel 2.4.25 and 2.6.8

[Benjamin Herrenschmidt]

> r.
> 
> So I've tried this using the stock Debian 2.6.8 and 2.6.9 PPC kernels with the 
> same results.
> 
> $ grep ATY /boot/config-2.6.9-powerpc
> CONFIG_FB_ATY128=y
> CONFIG_FB_ATY=y
> CONFIG_FB_ATY_CT=y
> CONFIG_FB_ATY_GX=y
> # CONFIG_FB_ATY_XL_INIT is not set
> 
> It seems that the atyfb module is compiled in. Is there another way to check?

Check the bits in CONFIG_PMAC_BACKLIGHT in atyfb (like, add some
printk's to see if they are reached etc..)

Ben