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[Bernhard Froemel <626079@xxxxxxxxxxxxxxxxxx>]

** Changed in: mactel-support
   Importance: Undecided => Low

** Changed in: mactel-support
     Assignee: (unassigned) => Bernhard Froemel (froemel)

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light sensor is not read ? (Lucid, MacbookPro 6.2)
https://bugs.launchpad.net/bugs/626079
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Status in Mactel Support: New

Bug description:
Hello,


I have a macbook pro 6.2 with lucid 64 bits (installed following this: https://help.ubuntu.com/community/MacBo … ucid#Video) and I try to read the output of light sensors in order to smartly control the screen and keyboard light.

1st question: It seems this functionnality did exist on previous ubuntu versions, right ?

2nd question: I should just have to read the 'light' file which contains the output of light sensors:
~$ cat /sys/devices/platform/applesmc.768/light
(0,0)


The trouble is this file always contains this (0,0), whatever the ambient light conditions are..



Nevertheless:


Code:

~$ dmesg|grep apple
[ 4.496393] apple 0003:05AC:0237.0001: input,hidraw0: USB HID v1.11 Keyboard [Apple Inc. Apple Internal Keyboard / Trackpad] on usb-0000:00:1a.7-1.2/input0
[ 4.499260] apple 0003:05AC:0237.0002: hidraw1: USB HID v1.11 Device [Apple Inc. Apple Internal Keyboard / Trackpad] on usb-0000:00:1a.7-1.2/input1
[ 4.502979] apple 0003:05AC:8242.0003: hiddev96,hidraw2: USB HID v1.11 Device [Apple Computer, Inc. IR Receiver] on usb-0000:00:1d.7-1.2/input0
[ 8.198273] applesmc: Apple MacBook Pro 6 detected:
[ 8.198275] applesmc: - Model with accelerometer
[ 8.198277] applesmc: - Model with light sensors and backlight
[ 8.198278] applesmc: - Model with 18 temperature sensors
[ 8.199332] applesmc: device has already been initialized (0xe0, 0xf.
[ 8.199334] applesmc: device successfully initialized.
[ 8.200274] applesmc: 2 fans found.
[ 8.203250] input: applesmc as /devices/platform/applesmc.768/input/input10
[ 8.203395] applesmc: driver successfully loaded.
[ 25.056833] applesmc: light sensor data length set to 10
[ 64.788156] applesmc: wait status failed: 5 != 0
[ 80.741403] applesmc: wait status failed: 4 != 0
[ 144.690224] applesmc: wait status failed: 5 != 1
[ 224.599671] applesmc: wait status failed: 5 != 1

(full output of this command in the attached file)

So it seems the system is recognizing light sensors ?

On the other hand:


Code:

:~$ sensors
applesmc-isa-0300
Adapter: ISA adapter
Left side :2585 RPM (min = 2000 RPM)
Right side :2574 RPM (min = 2000 RPM)
TB0T: +42.5°C 
TB1T: +42.5°C 
TB2T: +37.2°C 
TC0C: +60.0°C 
TC0D: +61.5°C 
TC0P: +62.0°C 
TC1C: +62.0°C 
TG0D: +61.0°C 
TG0P: +57.0°C 
TG0T: +61.5°C 
TMCD: +62.0°C 
TP0P: +67.5°C 
TPCD: +75.0°C 
Th1H: +53.8°C 
Th2H: +52.8°C 
Tm0P: +70.2°C 
Ts0P: +35.5°C 
Ts0S: +47.2°C


here no light sensors..


I also tried:

Code:

~$ hal-find-by-capability --capability light-sensor --verbose
Found 0 device objects of capability 'light-sensor'