https://bugzilla.kernel.org/show_bug.cgi?id=219890 --- Comment #1 from Jonathan Cameron (jic23@xxxxxxxxxx) --- On Mon, 17 Mar 2025 09:38:50 +0000 bugzilla-daemon@xxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=219890 > > Bug ID: 219890 > Summary: illuminance sensor is jittering between correct value > and 0.03lux > Product: Drivers > Version: 2.5 > Hardware: All > OS: Linux > Status: NEW > Severity: normal > Priority: P3 > Component: IIO > Assignee: drivers_iio@xxxxxxxxxxxxxxxxxxxxxx > Reporter: wysiwyg81@xxxxxxx > Regression: No > > Hello, > > I have a Lenovo thinkbook 13x gen4. > Automatic brightness control is flickering in Gnome, so I checked sensor with > monitor-sensor command (iio-sensor-proxy). > > it shows following behavior: > monitor-sensor --light > Waiting for iio-sensor-proxy to appear > +++ iio-sensor-proxy appeared > === Has ambient light sensor (value: 316,000000, unit: lux) > Light changed: 299,000000 (lux) > Light changed: 0,030000 (lux) > Light changed: 299,000000 (lux) > Light changed: 0,030000 (lux) > Light changed: 299,000000 (lux) > Light changed: 0,030000 (lux) > Light changed: 305,000000 (lux) > > > the 0.03 is unexpected has it has never been that dark. > it seems it's not a iio-sensor-proxy bug as I can see similar behavior by > checking directly content of here : > /sys/bus/iio/devices/iio:device0/in_illuminance_raw > > > I checked the behavior on windows to make sure it's not an hardware failure > from my sensor. > While I cannot have direct access to raw sensor data on windows, the > automatic > brightness is perfectly smooth: no flickering of any kind. > > I didn't found sensor name: > ❯ cat /sys/bus/iio/devices/iio:device0/name > als Two possibles types. It's either a hid sensor or an ACPI class interface with a sensor wrapped up in firmware. My guess is hid-sensor. Can you do an ls -lh in /sys/iio/devices/ so we can see what the parent is. +CC Srinivas based on playing guess the sensor. Jonathan > > But if there is other place I could look, let me know. > -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
