No GPIO LED with Linux Mint 21.1 [SOLVED]

[Mikael63]

Haven't been using any script for controlling LED in front for a l o o n g time now.
Now when trying as described here http://fit-pc.com/wiki/index.php?title= ... front_LEDs
(or by my script with same contents) I only got errors, unvalid arguments and so on?

Where to start troubleshooting?

[Mikael63]

Seems to be older kernel than 4.8 to get this to work..

If using gpioinfo - I get a lot of lines. What lines is the LED in front?

[malbers15]

I encountered this problem when I upgraded from kernel 5.4 in Ubuntu 20.04 to Linux Kernel 5.15 in Ubuntu 22.04. The answer was to offset the previous values by +512. I obtained this number by diffing the values in the superuser post. Following is the contents of a shell script that will turn all the front LEDs on the fitlet2 off:

Code: Select all

#!/bin/bash
# Make sure the LEDs on the front of the fitlet2 are off after booting up
# Reference:
# http://www.fit-pc.com/wiki/index.php?title=Application_note_-_fitlet2_controlling_front_LEDs
# Note that after upgrade to Linux Kernel 5.15 in Ubuntu 22.04 from kernel 5.4 in Ubuntu 20.04
# all previously known values must be offset by 512 (obtained by diffing the gpio chip values)
# https://superuser.com/questions/1736349/gpio-numbering-changed-after-upgrade-to-ubuntu-22-04
echo 947 > /sys/class/gpio/export
echo 948 > /sys/class/gpio/export
echo 949 > /sys/class/gpio/export
echo 950 > /sys/class/gpio/export
# default state for "out" is off/low
echo out > /sys/class/gpio/gpio947/direction
echo out > /sys/class/gpio/gpio948/direction
echo out > /sys/class/gpio/gpio949/direction
echo out > /sys/class/gpio/gpio950/direction
echo 947 > /sys/class/gpio/unexport
echo 948 > /sys/class/gpio/unexport
echo 949 > /sys/class/gpio/unexport
echo 950 > /sys/class/gpio/unexport

This Enum from my python scripts might help to:

Code: Select all

    class GPIO(Enum):
        led_1_green = "947"
        led_1_orange = "948"
        led_2_green = "949"
        led_2_orange = "950"

[Mikael63]

THANKS!!!

Work just fine to add 512 in my scripts!

[malbers15]

Great news! Can you put [SOLVED] in the title?

[Mikael_63]

Great news! Can you put [SOLVED] in the title?

No! My former user name Mikael63 does not work anymore.

[Andrey.Mazlin]

Great news! Can you put [SOLVED] in the title?

Did this on behalf of Mikael