Installing two GPSs on pixhawk 6x

Dear Friends,

I connected M10 GPS at GPS1 and F9P at GPS2. I could see the satellites list of the second GPS in MAVLink inspector. However, when I unplugged the 1st GPS , no satellite showed up at the front page but I can still see the 2nd one working on the MAVLink inspector.
I think I need to set primary and secondary GPS but couldn’t find the parameter in QGC. I want to set the second GPS - F9P as the primary one. How can I do it? My F9P is Holybro H-RTK F9P Rover Lite GPS with pin socket for GPS2 port. Thanks!

It is not set in QGC.

You’ll need to set this in PX4 or Arducopter if you re using that platform.

(But you can use QGC to access those settings).

Thank you!

I was able to go it by setting GPS1 (main GPS) to GPS2 port and GPS2 to GPS1 port. I found that the no of satellites in the front display displayed only those from the main GPS and I am still trying to understand by probing around.