TriggerHappy Daemon (THD) doesn't work on my Pi running Retropie ! Help

Djon

Hi, i think the title is pretty clear :)
I followed multiple tutorial to set up triggerhappy but nothing happen...
I mostly use this one : https://timee1994.weebly.com/nintimdo-rp-instructions.html ( go directly to the triggerhappy section).

So instaled triggerhappy : sudo apt-get install triggerhappy
When i do and press the key i want to use : thd --dump /dev/input/event*

I got : "EV_KEY BTN_BASE6 1 /dev/input/event4 "
"# BTN_BASE6 1 command "
"EV_KEY BTN_BASE6 0 /dev/input/event4 "
"# BTN_BASE6 0 command"

Finally i did : pi@retropie:~ $ sudo nano /etc/triggerhappy/triggers.d/testb.conf
and write inside : BTN_BASE6 1 sudo chmod 777 /sys/class/backlight/rpi_backlight/brightness && echo 25 > /sys/class/backlight/rpi_backlight/brightness
( the script sudo chmod 777... is useful to control the brightness of the Pi screen, and it works great when i type it in the terminal via SSH)

And restart triggerhappy : sudo service triggerhappy restart

I guess i do something wrong... please help me ! Thanks !

mitu

You don't need to use sudo in any of the commands, I think the trigggerhappy service already runs as root, so you won't have any permissions problems.
My advice would be to create a script in /home/pi/scripts/testb.sh, then reference this script in the the button event configuration

BTN_BASE6 1 /home/pi/scripts/testb.sh

This way you can modify the script anytime and you don't have to restart the thd service anytime you want to change something in the command to be executed. Give it a try.

Djon

@mitu
Thanks for your help !
That is a great idea, poorly i already tested it and it doesn't work aswell...

Djon

An "UP" is usefull in this website ?
:)

Djon

@mitu
Can you help me out ?

I will be very grateful
Thanks

mitu

@djon I would, but it's a guessing game without having the hardware to test it. It seems the problem is not in the configuration, but something with the service. Is the triggerhappy service running ? What does sudo systemctl status triggerhappy show ?

Djon

@mitu Thanks for your help, i could be very reactive if you want me to test it quick :)
First, triggerhappy don't run as root, anyway i need to do "sudo nano /etc/triggerhappy/triggers.d/testb.conf" (sudo) or the file will be unwritable.
Second, here's what the status said :

sudo systemctl status triggerhappy

● triggerhappy.service - triggerhappy global hotkey daemon

Loaded: loaded (/lib/systemd/system/triggerhappy.service; enabled; vendor pre

Active: active (running) since Tue 2018-06-05 23:19:15 UTC; 6 days ago

Main PID: 384 (thd)

CGroup: /system.slice/triggerhappy.service

     └─384 /usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --socket

Jun 12 22:37:00 retropie sudo[1353]: pam_unix(sudo:auth): auth could not identif

Jun 12 22:37:02 retropie thd[384]: Executing trigger action: sudo chmod 777 /sys

Jun 12 22:37:02 retropie thd[384]: We trust you have received the usual lecture

Jun 12 22:37:02 retropie thd[384]: Administrator. It usually boils down to these

Jun 12 22:37:02 retropie thd[384]: #1) Respect the privacy of others.

Jun 12 22:37:02 retropie thd[384]: #2) Think before you type.

Jun 12 22:37:02 retropie thd[384]: #3) With great power comes great responsi

Jun 12 22:37:02 retropie thd[384]: sudo: no tty present and no askpass program s

Jun 12 22:37:02 retropie sudo[1359]: pam_unix(sudo:auth): conversation failed

Jun 12 22:37:02 retropie sudo[1359]: pam_unix(sudo:auth): auth could not identif

lines 1-17/17 (END)...skipping...

● triggerhappy.service - triggerhappy global hotkey daemon

Loaded: loaded (/lib/systemd/system/triggerhappy.service; enabled; vendor pre

Active: active (running) since Tue 2018-06-05 23:19:15 UTC; 6 days ago

Main PID: 384 (thd)

CGroup: /system.slice/triggerhappy.service

       └─384 /usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --socket