[Mactel-linux-users] Backlight control on Macbook Pro

[Nicolas B. <ni...@bo...>]

Hi,

I just got initial support for LCD backlight control (source code
attached), it helps saving battery, and your eyes .-)

Compile it with:
gcc backlight.c -o backlight

and run it, as root:
# ./backlight (get current value)
Current value : 14
# ./backlight 15 (set value (15 is maximum, 0 minimum))

Maybe it should be integrated in the kernel, but I don't know where
(ACPI??). Does anyone know if 0xB2 and 0xB3 are standard registers?

Tested with Bootcamp, I don't know whether it also works with the legacy
EFI.

Best regards,

Nicolas