[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 #28 from Fred (wysiwyg81@rbox.co) ---
Hello,
After test as suggested here :
https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/-/issues/407#note_2828458

it seems buffer work better than polling !


Disable polling :

❯ cat /usr/lib/udev/rules.d/80-iio-sensor-proxy.rules
# iio-sensor-proxy
# IIO sensor to D-Bus proxy

ACTION=="remove", GOTO="iio_sensor_proxy_end"

# Set the sensor type for all the types we recognise
SUBSYSTEM=="hwmon", TEST=="light", ENV{IIO_SENSOR_PROXY_TYPE}+="hwmon-als"
SUBSYSTEM=="iio", TEST=="in_accel_x_raw", TEST=="in_accel_y_raw",
TEST=="in_accel_z_raw", ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-accel"
SUBSYSTEM=="iio", TEST=="scan_elements/in_accel_x_en",
TEST=="scan_elements/in_accel_y_en", TEST=="scan_elements/in_accel_z_en",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-buffer-accel"
SUBSYSTEM=="iio",
TEST=="scan_elements/in_rot_from_north_magnetic_tilt_comp_en",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-buffer-compass"
#SUBSYSTEM=="iio", TEST=="in_illuminance_input",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
#SUBSYSTEM=="iio", TEST=="in_illuminance0_input",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
#SUBSYSTEM=="iio", TEST=="in_illuminance_clear_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
#SUBSYSTEM=="iio", TEST=="in_illuminance_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
#SUBSYSTEM=="iio", TEST=="in_intensity_clear_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
SUBSYSTEM=="iio", TEST=="scan_elements/in_intensity_both_en",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-buffer-als"
SUBSYSTEM=="iio", TEST=="in_proximity_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-proximity"
SUBSYSTEM=="iio", TEST=="in_proximity0_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-proximity"
SUBSYSTEM=="input", ENV{ID_INPUT_ACCELEROMETER}=="1",
ENV{IIO_SENSOR_PROXY_TYPE}+="input-accel"

ENV{IIO_SENSOR_PROXY_TYPE}=="", GOTO="iio_sensor_proxy_end"

# We got here because we have a sensor type, which means we need the service
TAG+="systemd", ENV{SYSTEMD_WANTS}+="iio-sensor-proxy.service"

LABEL="iio_sensor_proxy_end"

~
❯ monitor-sensor  --light
    Waiting for iio-sensor-proxy to appear
+++ iio-sensor-proxy appeared
=== Has ambient light sensor (value: 234,999995, unit: lux)
    Light changed: 163,999996 (lux)
    Light changed: 133,999997 (lux)
    Light changed: 237,999995 (lux)
    Light changed: 207,999995 (lux)
    Light changed: 133,999997 (lux)
    Light changed: 228,999995 (lux)
    Light changed: 231,999995 (lux)
    Light changed: 229,999995 (lux)
    Light changed: 133,999997 (lux)
    Light changed: 225,999995 (lux)
    Light changed: 229,999995 (lux)
    Light changed: 173,999996 (lux)
    Light changed: 237,999995 (lux)
    Light changed: 188,999996 (lux)
    Light changed: 137,999997 (lux)
    Light changed: 227,999995 (lux)





Disabling buffer:



cat /usr/lib/udev/rules.d/80-iio-sensor-proxy.rules
# iio-sensor-proxy
# IIO sensor to D-Bus proxy

ACTION=="remove", GOTO="iio_sensor_proxy_end"

# Set the sensor type for all the types we recognise
SUBSYSTEM=="hwmon", TEST=="light", ENV{IIO_SENSOR_PROXY_TYPE}+="hwmon-als"
SUBSYSTEM=="iio", TEST=="in_accel_x_raw", TEST=="in_accel_y_raw",
TEST=="in_accel_z_raw", ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-accel"
SUBSYSTEM=="iio", TEST=="scan_elements/in_accel_x_en",
TEST=="scan_elements/in_accel_y_en", TEST=="scan_elements/in_accel_z_en",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-buffer-accel"
SUBSYSTEM=="iio",
TEST=="scan_elements/in_rot_from_north_magnetic_tilt_comp_en",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-buffer-compass"
SUBSYSTEM=="iio", TEST=="in_illuminance_input",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
SUBSYSTEM=="iio", TEST=="in_illuminance0_input",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
SUBSYSTEM=="iio", TEST=="in_illuminance_clear_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
SUBSYSTEM=="iio", TEST=="in_illuminance_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
SUBSYSTEM=="iio", TEST=="in_intensity_clear_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-als"
#SUBSYSTEM=="iio", TEST=="scan_elements/in_intensity_both_en",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-buffer-als"
SUBSYSTEM=="iio", TEST=="in_proximity_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-proximity"
SUBSYSTEM=="iio", TEST=="in_proximity0_raw",
ENV{IIO_SENSOR_PROXY_TYPE}+="iio-poll-proximity"
SUBSYSTEM=="input", ENV{ID_INPUT_ACCELEROMETER}=="1",
ENV{IIO_SENSOR_PROXY_TYPE}+="input-accel"

ENV{IIO_SENSOR_PROXY_TYPE}=="", GOTO="iio_sensor_proxy_end"

# We got here because we have a sensor type, which means we need the service
TAG+="systemd", ENV{SYSTEMD_WANTS}+="iio-sensor-proxy.service"

LABEL="iio_sensor_proxy_end"

~
❯ monitor-sensor  --light
    Waiting for iio-sensor-proxy to appear
+++ iio-sensor-proxy appeared
=== Has ambient light sensor (value: 263,000000, unit: lux)
    Light changed: 203,000000 (lux)
    Light changed: 148,000000 (lux)
    Light changed: 0,030000 (lux)
    Light changed: 230,000000 (lux)
    Light changed: 237,000000 (lux)
    Light changed: 172,000000 (lux)
    Light changed: 143,000000 (lux)
    Light changed: 0,030000 (lux)
    Light changed: 233,000000 (lux)
    Light changed: 0,030000 (lux)
    Light changed: 237,000000 (lux)

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