Re: Backlight is not ajustable in Ubuntu 8.04 and 8.10 alpha
I think to have these interfaces you might also need modules specific to your laptop make and model. Like for example thinkpad_acpi for lenovo (there are similar ones for toshiba, asus,..). If the hardware is not too new, that should even be in the mainline kernel.
Do the backlight keys work when you switch to a console?