mactel-support team mailing list archive

[Alex Murray <pragmatine@xxxxxxxxx>]

I guess we need to first get the values which the light sensor reports
for each of the different models under varying light conditions - then
we can identify which models need correcting / scaling for - ie. as I
mentioned before my MBP 5,1 reports only 4 out of 255 in a reasonably
well lit room so that is one candidate I would suggest - problem is that
I think we'll need to be able to easily adjust it - I suggest instead
what we do initially is add another sysfs file for applesmc called
light_scaling or something similar which can by written to by root and
that will then be used to scale the light sensor value by the driver -
users can then experiment to find a good value - then for each model we
can collect the scaling values which users report working well for them
an integrate them into a fixed table in the driver - but we can also
leave the light_scaling file available so it can be set manually still.
What do you reckon?

-- 
Backlight keeps getting darker on MacBookPro
https://bugs.launchpad.net/bugs/285815
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Support, which is the registrant for Mactel Support.

Status in Mactel Support: Fix Released
Status in “gnome-power-manager” source package in Ubuntu: Confirmed
Status in “hal” source package in Ubuntu: New

Bug description:
Binary package hint: hal

kjano@xxxxxxxxxxxxxxxx:

i am using a macbook pro 3.1 with intrepid beta and the nvidia driver. i finally managed to have the backlight keys F1 and F2 working but now i face another problem. when i change the backlight setting, it resets itself after some minutes to an average light level. then i use f2 to increase backlight again and some time later it goes down again.i have deactivated the shade setting in the gnome power management. the light is also turned down while moving the mouse or typing.