Missing /sys/bus/iio directory after Upgrade. (Ubuntu 14.04)

Duncan Iglesias

Hey community,

The /sys/bus/iio directory has gone missing after performing a system update.

I have been developing an application using the UP Board for the past month for a school project where I am reading in a raw voltage to one of the GPIO pins from the directory /sys/bus/iio/devices/iio\:device0/in_voltage_raw.

Is this just a case of a missing installation package or has it been moved?

Thanks,

DJI

Duncan Iglesias

SOLVED:

After I installed the most recent update the grub defaulted to Linux 4.4.0-47-generic instead of Linux 4.2.0-3-upboard. This resolved the discrepancy in the file system hierarchy.

In future, use the following to update/upgrade:

$    sudo apt update
$    sudo apt -y dist-upgrade

And then this to remove the other Linux boot options.

$    sudo apt -y autoremove --purge 'linux-.*generic'

Reboot and double check that you are using the Up Board image (ex. Linux 4.2.0-3-upboard).

$    uname -r 

DJI