I've just started with a Portenta X8 and I was trying to get serial monitor output using the Arduino IDE (1.8.15 and 2.0.3)
The blink.ino code with additional println statements works perfectly fine on a Portenta H7, giving serial output, but doesn't do anything on the X8. I've also noticed that when the X8 is installed, Windows device manager is showing CDC ECM under other devices with yellow ! in a triangle when the X8 is used, but not when the H7 is being used.
Has the X8 lost something? I am assuming it needs the CDC ECM it to provide the Serial communication.
Thanks in advance for any inspiration.