Laptop Panel brightness control

[David Zeuthen]

On Tue, 2006-05-09 at 18:58 +0100, Crispin Flowerday wrote:
> Hi,
> 
> While trying to fix http://bugzilla.gnome.org/show_bug.cgi?id=340231 it
> was discovered that laptops behave differently when the brightness
> control buttons are used.
> 
> Specifically, my IBM x31 controls the brightness itself (so g-p-m just
> needs to monitor the setting), whereas Richard Hughes's laptop (can't
> remember what it was just at the moment) just uses the buttons to talk
> to software which then has to control the brightness (so g-p-m needs to
> talk to the hardware directly).
> 
> So, we really could do with a HAL property to differentiate the 2 cases,
> how about "laptop_panel.brightness_in_hardware"?

Ugh, the joys of borken hardware. 

Yes, a property like laptop_panel.brightness_in_hardware, might be a
good idea. The docs should say that agents such as gnome-power-manager
(or whatever) should, if laptop_panel.brightness_in_hardware = TRUE,
refrain from doing SetBrightness(GetBrightness() + delta). Richard?

    David