I have written a simple code with python and pygame to display some images at my monitor. When I run it, everything works fine. i tried to make it run at system startup with systemd services. here is my service:
[Unit]
Description=Starts pygame
[Service]
User=rplab
WorkingDirectory=/home/myuser/
ExecStart=/bin/bash /home/myuser/MyPygame.sh
KillMode=process
[Install]
WantedBy=multi-user.target
When the system boots, it will start the service but unfortunately when I checked the service with systemd status, it gives this error:
pygame.error: No available video device
it seems as if it starts too soon that can't find my monitor, is it possible that I make the service start after the user logs in so that it can find my monitor?
The service file needs to tell systemd that it needs to start after user-session and graphical environment.
[Unit]
Description=Starts pygame
Wants=systemd-logind.service systemd-user-sessions.service display-manager.service
After=systemd-logind.service systemd-user-sessions.service display-manager.service
[Service]
....
....
[Install]
WantedBy=graphical.target
Make sure you are running a graphical.target as the default.
$ systemctl set-default graphical.target