backlight control

[Konstantin Svist]

On 09/28/2009 03:12 AM, Christoph Wickert wrote:
> Am Sonntag, den 27.09.2009, 13:58 -0700 schrieb Konstantin Svist:
>    
>> What component is responsible for turning off the backlight when the
>> laptop lid is down?
>>
>> I'm running F11/radeon/xfce
>>      
> xfce4-power-manager, if it's installed.
>
> Regards,
> Christoph
>
>    

Thanks, that was it.
The problem is that apparently X thinks my laptop panel doesn't support 
DPMS and because of that the backlight doesn't disable

Where do I dig now?