ArduPlane -C outputs bad file describer and garbled hex chars

Hi All

When I run ArduPlane in a shell with -C /dev/ttyAMA0
it outputs random hex chars and beeps and periodically “pread: Bad file descriptor”

Does anyone know why this happens?


What is the exact command that you use to run it?

sudo ArduPlane -C /dev/ttyAMA0

I have had this issue before, seems that you should use -A with only one telemetry link, or you can do

ArduPlane -C /dev/ttyAMA0 -A /dev/null

ArduPlane -A /dev/ttyAMA0