EKF2 IMU switching to compass x Messages

Alexis, Our nomenclature sometimes gets in our way here. When you say PX4 do you mean you are using a v4 platform or a PX4 based flight controller rather than a Pixhawk based or that you are using the PX4 flight stack?

In doing a little search it seems like a lot of similar reports.

Interesting discusion with Matt about memory problems on the Pixhawk 2.0 with EKF3 enabled. So check to make sure EKF3 is not enabled.

THis sounds the same but with EKF2 switching between optical