PowerMac G4 12″ Backlight
September 4th, 2004
The default linux 2.6 kernel does not support the backlight control of my notebook. The problem is that NVidia has not released any ppc drivers for this card and I have to use the Open Firmware video framebuffer (offb) from the kernel, which is like VESA extensions in a PC.
So the way to have support for it is to patch the offb with the NVidia specific code for the backlight control, this is not a nice way to do it, as the offb is meant to be a general driver for all OF devices, but this was the only way I found.
The patch can be obtained from any of these sources. To use it just do like normal, in the kernel tree do a patch -p1 < 02_nv_backlight.patch
The place from where I obtained the patch
Backup of the previous link