Thanks for the feedback rydberg - after looking into it some more it seems the new MBP / MBA's use the 10 byte light value from the left sensor as follows:
first 2 bytes seem to always be 01 next 2 bytes are a big endian 16-bit value of the ambient light value with a maximum value of 65535 next 2 bytes are a big endian 16-bit value of the ambient light value but is somehow scaled down from the first one and perhaps has a different dynamic range next 2 bytes are a big endian 16-bit value of the ambient light value with a maximum value of 1023 last 2 bytes I got no idea about So I've cooked up a patch to use the value which reports 1023 as max which just basically divides this by 4 to give us a value which we can return with a maximum of 255 like the max value on the older machines. It also seems the right sensor doesn't ever report anything so we just return 0 for this. Please test the attached patch and if possible can this be merged into the applesmc-dkms mactel package? ** Attachment added: "report light sensor value correctly on newer MacBooks" http://launchpadlibrarian.net/21099779/applesmc-dkms-light-sensor-fix.patch -- Backlight keeps getting darker on MacBookPro https://bugs.launchpad.net/bugs/285815 You received this bug notification because you are a member of Mactel 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 [email protected]: 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. _______________________________________________ Mailing list: https://launchpad.net/~mactel-support Post to : [email protected] Unsubscribe : https://launchpad.net/~mactel-support More help : https://help.launchpad.net/ListHelp
