Comment 88 for bug 333386

@Stefan Bader
I'm glad to inform you that now brightness *DO* react to brightnessup and brightnessdown scripts (/etc/acpi/video_*
) and seems fixed. The second check was the problem, definitely =).
Also "brightness gnome applet" and "brightness gnome control" (as gnome panel add-on) wok well.

Btw, there is a secondary issue with FN keys. Even if brightness reacts well to scripts, FN+keys seem broken. Let me explain what happens:

[Initial status of the machine is BRIGHTNESS_MAX]
If I press FN+BRIGHTNESS_DOWN just once
       > It increases (correctly) to BRIGHTNESS_MAX-1 but then *immediately*
           goes to BRIGHTNESS_MIN (wrong)

[Initial status of the machine is BRIGHTNESS_MIN]
If I press FN + BRIGHTNESS_UP just once
       > It increases to BRIGHTNESS_MAX+1 (correctly) but then immediately
           increases again, so finally it goes to BRIGHTNESS_MAX+2 (wrong)
If I press FN + BRIGHTNESS_UP again
       > It returns to BRIGHTNESS_MAX+1 (wrong)

The only way to increase brightness with the FN keys it's to keep FN+BRIGHTNESS_UP pressed for long, so that in the end it raises BRIGHTNESS_MAX level.

It's like if there's a wrong mapping with the keys or, worse, a wrong key event management. Anyway it has no link with the main issue, which seems completely solved.