Problem with autostart.sh on RPI-4 Libreelec 11.95.1 Omega

Kokemon · April 7, 2024 at 6:35 PM

Hallo !

I am using RPI-4 with powerboard from msldigital.com. This powerboard use autostart.ah for shutdown script. In previos version 20.03 was working normally and good. Bud when i update to version 11.195.1 Omega autostart.sh stop working. Is look like some folder are write protected.

**Da Flex** · April 8, 2024 at 6:24 PM

Start autostart.sh from SSH, and post the result. Eventually you have to make it executable first: chmod +x autostart.sh.

**vpeter** · April 8, 2024 at 6:52 PM

Quote from Da Flex

Eventually you have to make it executable first: chmod +x autostart.sh.

not needed

Kokemon · April 9, 2024 at 8:13 AM

Programi is OK ! I am sure. In version 11.0.6 was working normally. I know about chmod +x autostart.sh. Via ssh also has problem. Answrear after start is something like "can not create any folder and files".

I put bellow complet scrtipt (program), The problem is in libreelec a i´I think.

Thanks for any idea and help!

The first part of the instructions below adds the main shutdown script for the RemotePi Board to the autostart.sh file, which enables the script to run when the OS starts.

Key in (mind the . in front of config !) :
cd .config
nano autostart.sh
Copy and paste (use shift+ins to paste in nano) the following into the nano editor window. If there is already something in the file, just add the following as the last lines. If the last line is exit 0, then place the following lines before that line.
#!/bin/bash
(/storage/.config/irswitch.sh)&
Press ctrl+x to exit the editor, y to confirm, enter to save the file
Key in
chmod +x autostart.sh

The next part creates the main RemotePi Board shutdown script. This script shuts down the OS safely, when the button on the RemotePi Board or the off button on the remote is pressed :

Key in
nano irswitch.sh
Copy and paste the following text into the editor window
#!/bin/bash
# this is the GPIO pin receiving the shut-down signal
GPIOpin1=14
echo "$GPIOpin1" > /sys/class/gpio/export
echo "in" > /sys/class/gpio/gpio$GPIOpin1/direction
while true; do
sleep 1
power=$(cat /sys/class/gpio/gpio$GPIOpin1/value)
if [ $power != 0 ]; then
echo "out" > /sys/class/gpio/gpio$GPIOpin1/direction
echo "1" > /sys/class/gpio/gpio$GPIOpin1/value
sleep 3
poweroff
fi
done
Press ctrl+x to exit, y to confirm, enter to save the file
Key in
chmod +x irswitch.sh

The following additional script enables the RemotePi Board to cut off the power, after OpenElec / LibreELEC has been shut down from the on-screen menu.

Key in :
nano shutdown.sh
Copy and paste the following contents
#!/bin/bash
if [ "$1" != "reboot" ]; then
GPIOpin=15
GPIOpin1=14
echo "$GPIOpin" > /sys/class/gpio/export
# execute shutdown sequence on pin
echo "out" > /sys/class/gpio/gpio$GPIOpin/direction
echo "1" > /sys/class/gpio/gpio$GPIOpin/value
usleep 125000
echo "0" > /sys/class/gpio/gpio$GPIOpin/value
usleep 200000
echo "1" > /sys/class/gpio/gpio$GPIOpin/value
usleep 400000
echo "0" > /sys/class/gpio/gpio$GPIOpin/value
# set GPIO 14 high to feedback shutdown to RemotePi Board
# because the irswitch.sh has already been terminated
echo "$GPIOpin1" > /sys/class/gpio/export
echo "out" > /sys/class/gpio/gpio$GPIOpin1/direction
echo "1" > /sys/class/gpio/gpio$GPIOpin1/value
usleep 4000000
fi
Press ctrl+x to exit, y to confirm, enter to save the file
Mark the script as executable by keying in
chmod +x shutdown.sh
Reboot from the OpenElec or LibreELEC OS GUI.
After reboot you can use the RemotePi Board to power cycle OpenElec / LibreELEC

**vpeter** · April 9, 2024 at 9:15 AM

Why not checked the logs (journalctl -l) to see what is going on?

Or to run /storage/.config/irswitch.sh maualy from console? Before doing it kill already running instance.

Kokemon · April 9, 2024 at 2:56 PM

Can not running script because script need do create some new folder in folder sys/class/gpio and safe same data. I previous version Nexus was works normally. But in version OMEGA looks like all folders are write protected. This is not my scriot. This script use powerbutton module from msldigital.com and must shutdown rpi4 first and than dusconnected power for all system

**vpeter** · April 9, 2024 at 3:28 PM

Quote from Kokemon

Can not running script

Sure you can run it and this will tell you exactly what is write protected or whatever issue is.

HarryH · April 9, 2024 at 5:39 PM

The root cause of your script is that the usage of sysfs-gpio is deprecated. Now with kernels > 6.5 it was changed. You should first inspect which gpiochips are presented in your case.
ls -la /sys/class/gpio

Bash

# ls -la /sys/class/gpio/
total 0
drwxr-xr-x    2 root     root             0 Feb 27 18:26 .
drwxr-xr-x   50 root     root             0 Jan  1  1970 ..
--w-------    1 root     root          4096 Apr  9 18:16 export
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip512 -> ../../devices/platform/soc/fe200000.gpio/gpio/gpiochip512
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip570 -> ../../devices/platform/soc/soc:firmware/soc:firmware:gpio/gpio/gpiochip570
--w-------    1 root     root          4096 Apr  9 18:17 unexport

I don't know if it's a fixed value for RPi < RPi5. For the RPi4 gpiochip512 seems to be the right thing. Since it's not 0 like before, you now need to add the offset 512 to your GPIO number:

GPIOpin=15 -> GPIOpin=527
GPIOpin1=14 -> GPIOpin1=526

Edit:
Calculation is right. Locally tested with GPIO24 and checked with gpioinfo.

Kokemon · April 9, 2024 at 6:48 PM

Thank you for your answer. It means that I have to change some part of source code in script?

HarryH · April 9, 2024 at 7:06 PM

Yes, you must only change the value to the new digits.

Bash: shutdown.sh

#!/bin/bash
if [ "$1" != "reboot" ]; then
  GPIOpin=527
  GPIOpin1=526

Bash: irswitch.sh

#!/bin/bash
# this is the GPIO pin receiving the shut-down signal
GPIOpin1=526

Kokemon · April 9, 2024 at 9:12 PM

Thanks for help and advices. I will do any changes and I will report back here if is working or not.

Kokemon · April 9, 2024 at 9:58 PM

Excelent help !

Thank you so much. Now is working !!!!!!!!!!!!

I am happy!

HarryH · April 9, 2024 at 11:43 PM

Your are welcome.

Please keep in mind that this option to set the GPIO pins in this simple way may be removed in a future kernel release. If this happens, the scripts will need to be switched to using pinctrl or migrated to Python3 scripts.

Benoitone · April 14, 2024 at 9:58 PM

Quote from HarryH

Your are welcome.

Please keep in mind that this option to set the GPIO pins in this simple way may be removed in a future kernel release. If this happens, the scripts will need to be switched to using pinctrl or migrated to Python3 scripts.

Do you know if there is an adaptation of the old scripts with pinctrl instead of gpio? I have a rpi5 and I think I must use pinctrl.

Can you help me?

HarryH · April 15, 2024 at 7:17 PM

No, I don't know anything about such an adaptation. So far it was just a thought experiment on my part as to how things could continue to keep the project alive, since I don't have such a board.

What do you get if you look for mapped gpiochips on your RPi5 ?
ls -la /sys/class/gpio/

Benoitone · April 15, 2024 at 7:48 PM

I think it's the same as Rpi4 on libreelec 12 but it doesn't work if i use GPIOpin=527 and GPIOpin1=526

Shell session

LibreELEC:~ # ls -la /sys/class/gpio/
total 0
drwxr-xr-x    2 root     root             0 Feb 27 18:26 .
drwxr-xr-x   58 root     root             0 Jan  1  1970 ..
--w-------    1 root     root         16384 Apr 15 20:42 export
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip512 -> ../../devices/platform/soc/107d508500.gpio/gpio/gpiochip512
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip544 -> ../../devices/platform/soc/107d508500.gpio/gpio/gpiochip544
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip548 -> ../../devices/platform/soc/107d517c00.gpio/gpio/gpiochip548
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip565 -> ../../devices/platform/soc/107d517c00.gpio/gpio/gpiochip565
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip571 -> ../../devices/platform/axi/1000120000.pcie/1f000d0000.gpio/gpio/gpiochip571
--w-------    1 root     root         16384 Apr 15 20:42 unexport

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HarryH · April 15, 2024 at 8:24 PM

In the meanwhile I have played a little bit with pinctrl. But it's now your part to test if it works.

Bash: irswitch.sh

#!/bin/bash
# Created on: 2024-04-15 20:00
# Changed on: 2024-04-17 13:30
# Version: 1.2.0
#
# Changelog:
# 1.2.0 2024-04-17
# - version information added
# - migrated from deprecated usleep to sleep command
# 1.1.0 2024-04-16
# - restricted the pinctrl usage to the 40-pin header
# - use a more specific pin naming to prevent usage of the wrong pin
# 1.0.1 2024-04-15
# - pull-up/down setting added
# 1.0.0 2024-04-15
# - migrated to pinctrl
# - code comments added

PINCTRL_BIN="/usr/bin/pinctrl -p"
# this is the GPIO pin receiving the shut-down signal
GPIOpin1=GPIO14
# set GPIO14 to input
$PINCTRL_BIN set $GPIOpin1 ip pd
while true; do
    sleep 1
    # check if GPIO14 is going to high
    power=$($PINCTRL_BIN get $GPIOpin1 | awk '{ print $5 }')
    if [ "$power" = "hi" ]; then
        # change GPIO14 to output and set it to high level
        $PINCTRL_BIN set $GPIOpin1 op dh pn
        sleep 3
        poweroff
    fi
done

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Bash: shutdown.sh

#!/bin/bash
# Created on: 2024-04-15 20:00
# Changed on: 2024-04-17 13:30
# Version: 1.2.0
#
# Changelog:
# 1.2.0 2024-04-17
# - version information added
# - migrated from deprecated usleep to sleep command
# 1.1.0 2024-04-16
# - restricted the pinctrl usage to the 40-pin header
# - use a more specific pin naming to prevent usage of the wrong pin
# 1.0.1 2024-04-15
# - pull-up/down setting added
# 1.0.0 2024-04-15
# - migrated to pinctrl
# - code comments added

PINCTRL_BIN="/usr/bin/pinctrl -p"

if [ "$1" != "reboot" ]; then
    GPIOpin=GPIO15
    GPIOpin1=GPIO14
    # execute shutdown sequence on pin
    # set GPIO15 to output and high level for 125ms
    $PINCTRL_BIN set $GPIOpin op dh pn
    sleep 0.125
    # change the output to low level for 200ms
    $PINCTRL_BIN set $GPIOpin dl
    sleep 0.2
    # change the output to high level for 400ms
    $PINCTRL_BIN set $GPIOpin dh
    sleep 0.4
    # change the output to low level
    $PINCTRL_BIN set $GPIOpin dl
    # set GPIO 14 high to feedback shutdown to RemotePi Board
    # because the irswitch.sh has already been terminated
    $PINCTRL_BIN set $GPIOpin1 op dh pn
    sleep 4
fi

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Quote from Benoitone

I think it's the same as Rpi4 on libreelec 12 but it doesn't work if i use GPIOpin=527 and GPIOpin1=526

Shell session

LibreELEC:~ # ls -la /sys/class/gpio/
total 0
drwxr-xr-x    2 root     root             0 Feb 27 18:26 .
drwxr-xr-x   58 root     root             0 Jan  1  1970 ..
--w-------    1 root     root         16384 Apr 15 20:42 export
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip512 -> ../../devices/platform/soc/107d508500.gpio/gpio/gpiochip512
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip544 -> ../../devices/platform/soc/107d508500.gpio/gpio/gpiochip544
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip548 -> ../../devices/platform/soc/107d517c00.gpio/gpio/gpiochip548
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip565 -> ../../devices/platform/soc/107d517c00.gpio/gpio/gpiochip565
lrwxrwxrwx    1 root     root             0 Feb 27 18:26 gpiochip571 -> ../../devices/platform/axi/1000120000.pcie/1f000d0000.gpio/gpio/gpiochip571
--w-------    1 root     root         16384 Apr 15 20:42 unexport

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To make it complete, please check every listed chip:

Code

cat /sys/class/gpio/gpiochip512/ngpio
cat /sys/class/gpio/gpiochip512/label

The correct one has 58 on the RPi4 (but the pin count could be split/vary on RPi5) as the return value for ngpio and I'm assuming the label is "pinctrl-bcm2712" or something similar.

EDIT:
Benoitone I have added pull-down for the input pin, to be ensure the pin isn't floating.

Benoitone · April 15, 2024 at 8:41 PM

Quote from HarryH

In the meanwhile I have played a little bit with pinctrl. But it's now your part to test if it works.

Bash: irswitch.sh

#!/bin/bash
PINCTRL_BIN=/usr/bin/pinctrl
# this is the GPIO pin receiving the shut-down signal
GPIOpin1=14
# set GPIO14 to input
$PINCTRL_BIN set $GPIOpin1 ip
while true; do
    sleep 1
    # check if GPIO14 is going to high
    power=$($PINCTRL_BIN get $GPIOpin1 | awk '{ print $5 }')
    if [ "$power" = "hi" ]; then
        # change GPIO14 to output and set it to high level
        $PINCTRL_BIN set $GPIOpin1 op dh
        sleep 3
        poweroff
    fi
done

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Bash: shutdown.sh

#!/bin/bash
PINCTRL_BIN=/usr/bin/pinctrl

if [ "$1" != "reboot" ]; then
    GPIOpin=15
    GPIOpin1=14
    # execute shutdown sequence on pin
    # set GPIO15 to output and high level for 125ms
    $PINCTRL_BIN set $GPIOpin op dh
    usleep 125000
    # change the output to low level for 200ms
    $PINCTRL_BIN set $GPIOpin dl
    usleep 200000
    # change the output to high level for 400ms
    $PINCTRL_BIN set $GPIOpin dh
    usleep 400000
    # change the output to low level
    $PINCTRL_BIN set $GPIOpin dl
    # set GPIO 14 high to feedback shutdown to RemotePi Board
    # because the irswitch.sh has already been terminated
    $PINCTRL_BIN set $GPIOpin1 op dh
    usleep 4000000
fi

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I have to do more tests when I get home, but it seems to be ok
Thanks a lot