I can add two XF86BrightnessAdjust keys to the list:
keycode 101 (keysym 0x1008ff3b, XF86BrightnessAdjust) keycode 212 (keysym 0x1008ff3b, XF86BrightnessAdjust)
Both, as you can see, are recognised by xev (X.org 1.5.2), and both work in GNOME (2.26.3).
Using KDE 4.3 / openSUSE 11.1 / MacBook 4,1.
I can add two XF86BrightnessA djust keys to the list:
keycode 101 (keysym 0x1008ff3b, XF86BrightnessA djust) djust)
keycode 212 (keysym 0x1008ff3b, XF86BrightnessA
Both, as you can see, are recognised by xev (X.org 1.5.2), and both work in GNOME (2.26.3).
Using KDE 4.3 / openSUSE 11.1 / MacBook 4,1.