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

Djon

Waaa we're so close now !!
So when i type
"/usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --deviceglob /dev/input/event*" from the terminal and press my button, it actually works !

Now i'm not sure when to add the line, should i do "sudo nano /etc/rc.local" and go at the end and copy and paste ?

FYI, when i type "sudo nano autostart.sh" the file is empty
@mitu

mitu

@djon The autostart.sh file is in /opt/retropie/configs/all/autostart.sh, but try with /etc/rc.local first. You'll need to reboot to test it.

Djon

@mitu
if the line need to start at boot, i also have a python code running at boot, i added the pyton path at the end of /etc/profile
Don't know if it can help here :)

Djon

@mitu
So i did : sudo nano /etc/rc.local
And added at the end of the file
"/usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --deviceglob /dev/input/event* &"
Then sudo reboot

But it still not working

Djon

Maybe should i past it before "exit 0" line ?

mitu

@djon Does the process shows up when your run ps -ef from the terminal ?
EDIT: Yes, of course you need to add it before the exit, otherwise it's not executed.

Djon

Ok so i add it before "exit 0" this time and run ps -ef @mitu
And i think the line you're interested in is
"nobody 364 1 0 03:26 ? 00:00:00 /usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --socket /run/thd.socket --user nobody --deviceglob /dev/input/event*"

mitu

@djon Doesn't seem to be correct. Have you disabled the service ? The process shown there seems the one started from the built-in service script. Post your rc.local file contents, surrounded by code tags (```).

Djon

No prob ! @mitu


#

# rc.local

#

# This script is executed at the end of each multiuser runlevel.

# Make sure that the script will "exit 0" on success or any other

# value on error.

#

# In order to enable or disable this script just change the execution

# bits.

#

# By default this script does nothing.



# Print the IP address

_IP=$(hostname -I) || true

if [ "$_IP" ]; then

  printf "My IP address is %s\n" "$_IP"

fi



/usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --devicelob /dev/input/event* &



exit 0

mitu

@djon Just change it to

# Start THD as user pi
nohup /usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --user pi --deviceglob /dev/input/event* &

exit 0

and reboot. Disable the service with sudo systemctl disable triggerhappy first.

Djon

I'll do it in a sec, so i'll change all the file just with these lines ? @mitu

Djon

Okay so i made the mistake to erase all the file, to put just your line...
So i did it again, with just your line at the end, and i can say... that... it is workinggggggggggg !!!!!!! @mitu

I think that i will start again from stratch with a brand new retropie image, next time i'll just need to put :

# Start THD as user pi
nohup /usr/sbin/thd --triggers /etc/triggerhappy/triggers.d/ --user pi --deviceglob /dev/input/event* &

exit 0

Or i'll need to take all the steps we made ?

Djon

Since you're here @mitu and that your the best guy ever, i need to change a bit the script to make the brightness increase by 25% each time, i was thinking :

sudo chmod 777 /sys/class/backlight/rpi_backlight/brightness && echo 25% > /sys/class/backlight/rpi_backlight/brightness

... hum no i just test it and they say "invalid argument"

FYI the brightness can go from 0 to 250

Headrush69

I ran into the same issue trying to get triggerhappy to process the VOLUME_UP and VOLUME_DOWN events from my Dell AC511 soundbar.

No matter whether I set the user to run the process as in /etc/defaults/triggerhappy, or /etc/init.d/triggerhappy, it would always run as user nobody.

The process would run, but because nobody doesn't have privileges, my commands to amixer would not run.

The solution I found was to edit /etc/systemd/system/multi-user.target.wants/triggerhappy.service and set the user in there to pi.

After doing that and restarting the daemon, the triggerhappy process ran under user pi and everything worked.

Edit: Future updates my overwrite changes to this file, I don't know.

simple

@headrush69 Thank you sssssssssssssooooooooooooooooooo much headrush!
I have spent the last 2 days digging for this!!
My volume knob, It WORKS!

I literally created an account here just to thank you!