Making Tobii eye tracker work with SU9

Try following steps 1-34 as detailed here in this post:
https://forums.flightsimulator.com/t/settings-setup-guide-for-the-tobii-eye-tracker-5/502973/10

If that doesn’t fix it then I would recommend switching to using FaceTrackNoIR as when MSFS stops responding to Tobii input you can press the Stop button inside of FaceTrackNoIR:
image
and then press the Start button and MSFS will start responding to Tobii input again without having to quit and restart MSFS.I wrote up a guide on how to use FaceTrackNoIR here: https://forums.flightsimulator.com/t/making-tobii-eye-tracker-work-with-su8/472111/252