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I am trying to start a java SWT application after the system has booted and the user has logged in on a debian based distro (RaspbianOS on a Raspberry Pi). Therefore I have added the line sh <path>/startProgram.sh into the rc.local file.

I know that the start-script is getting called because I created a new directory for debug purposes in this script. Apart from that the script looks like this:

java -jar /home/pi/Downloads/AlarmClock.jar

And if I double click it manually it starts the application just fine. However it won't start at boot of the system. My first thought was that the X-server has not yet been initialized at that point but according to this article the rc.local script is the very last init script to run and therefore the x-server should be initialized by then (at least according to my understanding)

Does anyone has an idea on how to start the program that will create a GUI after user login?

  • You don't tell us if your program needs a running Xserver instance and a window manager. The service "x11-common", which is started at boot, does not start the Xserver - it's task is to "set up the X server and ICE socket directories". The Xserver and window manager is started by lightdm when logging in. – ridgy Apr 23 '17 at 12:10
  • Well I am creating a graphical user interface via SWT therefore I simply assumed that I need the Xserver running for that... – Raven Apr 23 '17 at 12:43
  • Could it be that I need to place my script into /etc/X11/xinit/xinitrc.d? Or does that directory serve another purpose? – Raven Apr 23 '17 at 12:51
  • As stated before there is no Xserver running after boot, and no GUI application possible before logging in - see freedesktop.org/wiki/Software/LightDM. If you want to have some program running with GUI before logging in, try to get familiar with greeters – ridgy Apr 23 '17 at 12:54
  • xinitrc(global or userlocal) is run by xinit. This is used to manually start the Xserver; I don't believe you can have an Xserver started this way at boot and in parallel have a displaymanager for logging in... – ridgy Apr 23 '17 at 13:01
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Okay it turned out the way to go is to create a dektop entry in ~/.config/autostart that then runs the script starting my application (I guess it would also work when starting it directly from there).

Note:
A desktop entry has to have the extension .desktop otherwise it won't work even if the content is correct.

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