Comment 31 for bug 43572

I've played around a bit with the patch suggested by Richard Hughes in the
following mail: http://lists.freedesktop.org/archives/hal/2006-June/005511.html

Apart from that I needed to change the smbios.system.manufacturer key to "Dell
Computer Corporation" it works ok.

The result is a bit crude though, changing the brightness one step takes ~0.5 s.
Which makes a change from low-to-high or high-to-low quite painful. It is in no
way as elegant as for instance, the Apple notebooks.
I've tried to speed up the dellLcdBrightness program by removing the cout calls,
but the results were limited.

What is nice though, is that I'm now able to set different brightness levels
from g-p-m, something that wasn't possible before.

An improvement is perhaps to implement the libsmbios calls directly into hal,
avoiding the spawning of a dellLcdBrightness process for each brightness level.

If you're interested I can make a video clip of the brightness change.