I flew my s500 quad regularly on Ardupilot, but I wanted to give PX4 a try, so I flashed, configured the hardware, and went flying in stabilized. To my surprise, the left side of the drone’s rotors were not working properly and became very wobbly and unstable in flight. I tried troubleshooting if it was a motor issue, ESC issue, or something wrong with the Pixhawk. I decided to go back to Ardupilot, and everything works fine! Is there an issue with the current PX4 firmware that is incompatible with the Pixhawk 2.4.8? I use Pixhawk 4s at work, so I know they work just fine on the latest firmware, so maybe my old Pixhawk cant run it 
Hello. I have a PixHawk 2.4.8 that I flashed to px4 1.11 FMU V2 firmware.
I am having issues with SBus input from Receiver to the PixHawk
Can’t pass a preflight, can’t test spin my motors, can’t get off the deck months after
building the aircraft.
I’m pretty convinced the issue is the Receiver and it’s proprietary flavor of SBus.
I suppose I could try loading ArduPilot Copter and see if that changes anything.