Cannot initialize GPIO.INPUT on BeagleBone Black Ubuntu 20.04

[mrunaljsarvaiya]

I'm running into issues when initializing a GPIO pin as input on a BeagleBone Black running Ubuntu 20.04 (https://forum.digikey.com/t/ubuntu-server-20-04/6649/25). Here is the python3 code

#! /usr/bin/env python3

import time
import Adafruit_BBIO.GPIO as GPIO
import Adafruit_BBIO.PWM as PWM
import Adafruit_BBIO.ADC as ADC
from Adafruit_I2C import Adafruit_I2C

def test_GPIO_output():
    channel = "P8_10"
    GPIO.setup(channel, GPIO.IN)
    GPIO.cleanup()

if __name__ == '__main__':
    test_GPIO_output()

When I run the script above I get the following error which looks similar to these issues in the past, although they seem to have a different configuration so I wasn't sure how to proceed. #165 and #248

Traceback (most recent call last):
  File "test.py", line 15, in <module>
    test_GPIO_output()
  File "test.py", line 11, in test_GPIO_output
    GPIO.setup(channel, GPIO.IN)
ValueError: Set gpio mode failed, missing file or invalid permissions.

Here is the output of my system to sudo /opt/scripts/tools/version.sh

git:/opt/scripts/:[4d3a0aff57aae78a0db890f72ce505f61f1a93ce]
eeprom:[A335BNLTEIA02033SBB11671]
model:[TI_AM335x_BeagleBone_Black]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2019.04-dirty]:[location: dd MBR]
bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 2019.04-00002-g31a8ae0206]:[location: dd MBR]
kernel:[5.4.0-26-generic]
/boot/uEnv.txt Settings:
pkg check: to individually upgrade run: [sudo apt install --only-upgrade <pkg>]
pkg:[bb-cape-overlays]:[4.14.20200430.0-0~focal+20200430]
WARNING:pkg:[bb-wl18xx-firmware]:[NOT_INSTALLED]
pkg:[kmod]:[27-1ubuntu2]
WARNING:pkg:[librobotcontrol]:[NOT_INSTALLED]
groups:[ubuntu : ubuntu adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal input netdev i2c bluetooth gpio pwm eqep remoteproc admin spi iio docker tisdk weston-launch xenomai cloud9ide]
cmdline:[console=ttyO0,115200n8 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait]
dmesg | grep remote
[  105.467106] remoteproc remoteproc0: wkup_m3 is available
dmesg | grep pru
dmesg | grep pinctrl-single
[    2.826750] pinctrl-single 44e10800.pinmux: 142 pins, size 568
dmesg | grep gpio-of-helper
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
END

[RaiBnod]

Same issue on: AM3358 Debian 10.3 2020-04-06 4GB SD IoT

Code: GPIO.setup("P9_31", GPIO.IN)

Exception: ValueError: Set gpio mode failed, missing file or invalid permissions.

[RobertCNelson]

P9_31 = audio... you have hdmi audio disabled right?

Regards,