mactel-support team mailing list archive

[Bernhard Froemel <626079@xxxxxxxxxxxxxxxxxx>]

Ok, good!
I close this for now as invalid and make a comment on the help pages to ensure latest firmware updates are installed. If you or someone else ever has this issue (again) we'll reopen it and hopefully either you or someone else with this issue is able to solve it. In my case, the light readings never failed right from the start - and I  use Linux on my MBP almost exclusively.

** Changed in: mactel-support
       Status: New => Invalid

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

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'