Failed to find ambient light sensors on MacBook Air (3,1)

on a MacBook Air (3,1) I get, with either holylight-checker or realtime:

Failed to find ambient light sensors

AFAIK, this model does have one, but I guess I'm wrong?

[Dinduks]

Hi,
After some research on the Internet, your MBA does apparently have a light sensor.
Unfortunately, I can't debug the problem because I don't have the same computer as you; but I can tell you the problem comes somewhere from here.
Would you please check if you get any specific error after L17?

Hi,

I'm not sure if this is what you wanted me to test, but I've allowed to pass the test on serviceObject and recompiled.
When I run manually I get this error message:

IOServiceOpen: (ipc/send) invalid destination port

[Dinduks]

Thanks. I'll search how to fix the error when I'll have some time.