12c137bcf1
build_channel_array() goes through each directory member in scan_elements folder and tries to get scale and offset of matching elements. But there will be no scale and offset for some elements like timestamp. For example: in_accel_x_en in_accel_y_en in_accel_z_en in_timestamp_en in_accel_x_index in_accel_y_index in_accel_z_index in_timestamp_index in_accel_x_type in_accel_y_type in_accel_z_type in_timestamp_type When scale and offset not present, iioutils_get_param_float() will fail, this causes return from the build_channel_array(). It shouldn't return when the error is caused by the attribute not being present as, in this case, in_time_stamp_scale. This was fixed in the kernel's iio_utils.c in commit 7868dfd. https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7868dfd216074fc5f902e7befacda2a0ec76e403 Closes: #114
iio-sensor-proxy
IIO sensors to D-Bus proxy
See https://developer.gnome.org/iio-sensor-proxy/1.0/ for developer information.
Installation
./configure --prefix=/usr --sysconfdir=/etc
make
make install
It requires libgudev and systemd.
Usage
With a GNOME 3.18 (or newer) based system, orientation changes will automatically be applied when rotating the panel, ambient light will be used to change the screen brightness, and Geoclue will be able to read the compass data to show the direction in Maps.
Note that a number of kernel bugs will prevent it from working correctly on some machines so please make sure to use the latest upstream kernel (kernel crashes on the Surface Pro, sensor failing to work after suspend on the Yoga Pro, etc.).
You can verify that sensors are detected by running udevadm info --export-db
and checking for an output resembling this one:
P: /devices/platform/80860F41:04/i2c-12/i2c-BMA250E:00/iio:device0
N: iio:device0
E: DEVNAME=/dev/iio:device0
E: DEVPATH=/devices/platform/80860F41:04/i2c-12/i2c-BMA250E:00/iio:device0
E: DEVTYPE=iio_device
E: MAJOR=249
E: MINOR=0
E: SUBSYSTEM=iio
E: SYSTEMD_WANTS=iio-sensor-proxy.service
E: TAGS=:systemd:
E: USEC_INITIALIZED=7750292
You can now check whether a sensor is detected by running:
gdbus introspect --system --dest net.hadess.SensorProxy --object-path /net/hadess/SensorProxy
After that, use monitor-sensor to see changes in the ambient light sensor
or the accelerometer. Note that compass changes are only available to GeoClue
but if you need to ensure that GeoClue is getting correct data you can run:
su -s /bin/sh geoclue -c monitor-sensor
If that doesn't work, please file an issue, make sure any running iio-sensor-proxy
has been stopped:
systemctl stop iio-sensor-proxy.service
and attach the output of:
G_MESSAGES_DEBUG=all /usr/sbin/iio-sensor-proxy
running as root.
Tested on
- Lenovo IdeaPad Yoga 13
- Microsoft Surface Pro 2
- Lenovo Yoga 2 Pro
- Lenovo Yoga 2 13" and 11"
- Lenovo Yoga 900
- Onda v975w
- Dell Venue 8 Pro
- Dell Venue 11 Pro (7140)
- Lenovo ThinkPad Twist
- MacBook Pro (8.2)
- Lenovo X1 Carbon 2014 (rev2)
- MacBook Air (6,2)
- MacBook Air (4,2)
- Toshiba Portégé Z10t
- Toshiba Radius 11 L10WC10C
- Dell Inspiron 13 7000
- Cube i9
- HP Pavilion X360