MPU-9255

[Sailoog]

I think I got it. An old version of RTIMULIb is installed on Raspbian by default. Actually the Sensor Hat uses this library. If you want to delete old files you should type:

sudo apt-get remove --purge librtimulib-dev librtimulib-utils librtimulib7 python-rtimulib python3-rtimulib

Then I think the last test should be:
Burn a fresh OP and update to latest version.
run: sudo apt-get remove --purge librtimulib-dev librtimulib-utils librtimulib7 python-rtimulib python3-rtimulib
install RTIMULib from Nick repo
test

If this works we do not need to start a new image, just remove old packages on update sequence, choose a RTIMULib fork from Nick or others and add your code.