[Bug 219890] illuminance sensor is jittering between correct value and 0.03lux

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219890

--- Comment #10 from Srinivas Pandruvada (srinivas.pandruvada@linux.intel.com) ---
I think you have multiple als sensors on the systems.
You can also give a run with for device 0, which is the sensor you are reading
in your description. This is USB hub.

sudo ./iio_generic_buffer -N 0 -a -c 1000



Those column headers are

Intensity, illumination, color temp, chromocity X, chromocity Y, timestamp

What you are reading from first 2, which are same here.

There is no 0 here, as sensor is ON always.

But when you read a raw value 

/sys/bus/iio/devices/iio:device0/in_illuminance_raw

The sensor is turned ON and kept ON for 3 seconds. I think when sensor is
turned on the first sample is always 0. Using your description of device 0
"../../../devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8:1.0/0003:17EF:F006.000E/HID-SENSOR-200041.6.auto/iio:device0
"


cd /sys/bus/platform/devices/HID-SENSOR-200041.6.auto/power
echo on > control

And try to cat the /sys/bus/iio/devices/iio:device0/in_illuminance_raw
in a loop.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.