On Wed, Dec 17, 2014 at 4:34 AM, jenia.ivlev <jenia.iv...@gmail.com> wrote: > > Hello. > > I want to start synapse (its a program that allows to run programs more > easily) at login using systemd. So I created this systemd-service config > file: > > [Unit] > Description=Syanpse start up > After=lxdm.service > > [Service] > User=jenia > ExecStart=/usr/bin/synapse > > [Install] > WantedBy=multi-user.target > > I doesnt work neither automatically, nor by calling > /usr/lib/systemd/system/synapse.service as so: > systemctl start synapse >
I see that Synapse is an X11 program, gtk-based. The system service manager, whether it was systemd or another init, is not suitable for this because it has no knowledge about the X11 sessions that might be active. (Indeed, "After=lxdm.service" won't actually make it start _at login_, but at the time the welcome screen shows up.) <tldr> Remember that by design there can be zero or several people running their own X11 servers at once; programs therefore need to know environment variables like $DISPLAY (and several others) to choose the right one. That's why you get this: > Dec 16 21:23:11 station1 synapse[8545]: [02:23:11.040620 Gtk-Warning] > cannot open display: > Setting these variables statically in your .service would be a poor idea since they can change (some of them _do_ change every time lxdm starts), not to mention being exactly the kind of ugly hack that systemd tries to avoid. (And while systemd _is_ trying to eventually reach the point where simply setting User= should be enough to discover all such information, it still wouldn't help you, because your service still starts together with lxdm, _before_ you actually log in.) </tldr> For now, it will be easiest to start such services from your desktop environment, as it already runs inside your graphical login and therefore knows all the necessary settings. Whether you use GNOME or Enlightenment or LXDE or a custom-built environment on top of a tiny tiling WM, they all have ways to autostart programs. Most of them support the XDG Autostart <http://standards.freedesktop.org/autostart-spec/autostart-spec-latest.html> specification. Put this in ~/.config/autostart/synapse.desktop: [Desktop Entry] Type=Application Name=Synapse Exec=/usr/bin/synapse -- Mantas Mikulėnas <graw...@gmail.com>
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