Can't detect rising or falling signal on GPIO

I am using this code to detect the rising and falling signal from a encoder using my Jetson Orin Nano. I have verified that if I connect line 105 to 3.3V on the board, the rising edge is detected by the code and if I connect it to zero volts, falling edge is detected by the code. Separately, I have verified that the encoder shows rising and falling voltage when tested with a multimeter. But when I connect the encoder to line 105, rising and falling signal is not detected. Why would that be the case? Any help will be appreciated. Thank you!

import gpiod
from gpiod.line import Edge

def watch_line_rising(chip_path, line_offset):
    with gpiod.request_lines(
        chip_path,
        consumer="watch-line-rising",
        config={line_offset: gpiod.LineSettings(edge_detection=Edge.BOTH)},
    ) as request:
        print("Watching line for rising and falling edges...")
        while True:
            # Blocks until at least one event is available
            events = request.read_edge_events()
            if not events:
                print("No events detected")
            for event in events:
                if event.event_type == Edge.RISING:
                    print(
                        "line: {}  type: Rising   event #{}".format(
                            event.line_offset, event.line_seqno
                        )
                    )
                elif event.event_type == Edge.FALLING:
                    print(
                        "line: {}  type: Falling   event #{}".format(
                            event.line_offset, event.line_seqno
                        )
                    )

if __name__ == "__main__":
    try:
        watch_line_rising("/dev/gpiochip0", 105)
    except OSError as ex:
        print(ex, "\nCustomise the example configuration to suit your situation")

There is no update from you for a period, assuming this is not an issue anymore.
Hence, we are closing this topic. If need further support, please open a new one.
Thanks

Hi atd,

Are you using the devkit or custom board for Orin Nano?
What’s the Jetpack version in use?

What is gpio line 105 of gpiochip0 in your case?
Have you configured this pin as input in pinmux before use?
Please also share the block diagram of your connection for further check.