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After trying every possible solution online I am posting this question. I have a python script that runs on boot with the help of systemd. Everything worked fine till I installed a fresh raspian buster. Now I am able to run the python program via both systemd and through Thonny Editor. But the difference is that systemd doesn't give any audio output while the editor does. I tried to run my python script via terminal and the audio was playing without any issues.

Now please note that I have another raspberry pi which is still running the older version of the OS with the same systemd configuration and everything works fine in it. Now I could have easily cloned that sd card and used it but that sd card is 16 GB and I want to migrate to a 32 GB sd card(I tried cloning, pi didn't boot up)

This is the systemd service file

[Unit]
Description=My Service
After=network.target

[Service]
ExecStart=/usr/bin/python3 -u Main.py
WorkingDirectory= /home/pi/xyz
StandardOutput=inherit
StandardError=inherit
Restart=always
User=pi


[Install]
WantedBy = default.target

Systemd runs the python file without any errors but with no audio output. Please help me out.

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6
  • What does the script do? Does it endless play a sound in the background? Do you use pulseaudio?
    – Ingo
    Commented Jan 10, 2021 at 18:44
  • @Ingo The script plays a welcome sound when started and then will play sound whenever the push buttons are clicked. Very basic stuff.
    – Nitesh Singh
    Commented Jan 11, 2021 at 2:26
  • 1
    I am having the same problem exactly. Was a solution ever found? I can get it to work via a .desktop file, but I'd really like to use functionality of systemd.
    – Peter Wiley
    Commented May 19, 2021 at 20:16
  • @PeterWiley No solution was found. I had to shift to the older version of Raspian OS. Because after updating this problem started for me.
    – Nitesh Singh
    Commented May 20, 2021 at 8:10
  • 1
    I know, I'm the one who submitted the answer.
    – Peter Wiley
    Commented May 21, 2021 at 16:03

2 Answers 2

Reset to default
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The answer to this issue can be found here:

https://www.raspberrypi.org/forums/viewtopic.php?t=278665

The solution presented worked for me to get sound while running a python program from system.

What one has to do is to add defaults to the asound.conf file at /etc/asound.conf. I did sudo nano on file and found nothing in it, so I added

   defaults.pcm.card 1
   defaults.pcm.card 1

Why "1"? It's the number given when one does

    pi@xxxx:~ $ cat /proc/asound/cards
    0 [b1             ]: bcm2835_hdmi - bcm2835 HDMI 1
                  bcm2835 HDMI 1
    1 [Headphones     ]: bcm2835_headphonbcm2835 Headphones - bcm2835 Headphones
                  bcm2835 Headphones

In my case I wanted sound out of the headphone jack.

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1
  • Thank you so much for the answer.
    – Nitesh Singh
    Commented May 21, 2021 at 8:17
0

This service file worked for me... Note how it starts after After=sound.target

[Unit]
Description=FireHouse Game
After=sound.target

[Service]
Type=simple
Environment="DISPLAY=:0"
Environment="XAUTHORITY=/home/pi/.Xauthority"
ExecStart=/usr/bin/python3 /home/pi/FireGame/fire_game.py
Restart=on-abort
KillMode=process
SendSIGHUP=nos

[Install]
WantedBy=graphical.target
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