Re: devilspie2 user service issues

[Mantas Mikulėnas <grawity@xxxxxxxxx>]

On Tue, Aug 6, 2019 at 10:08 PM Matt Zagrabelny <mzagrabe@xxxxxxxxx> wrote:

Greetings,

I am trying to write a service file for a tool called devilspie2.

% systemctl --user cat devilspie.service
# /home/mzagrabe/.config/systemd/user/devilspie.service
[Unit]
Description=devilspie

[Service]
ExecStart=/usr/bin/devilspie2

[Install]
WantedBy=default.target

which I enabled via:

% systemctl --user enable devilspie.service

but it is not successfully starting on boot/login:

It looks like devilspie2 does not successfully start under a user systemd instance due to "cannot open display".

Since I log in via lightdm I am wondering what I am missing.

Well, "on boot/login" actually happens before the X display (Xorg) is launched. Even without linger mode, the --user default.target is started before the session processes themselves (it's done right after lightdm does the password check, more or less); at that point in time --user doesn't know your $DISPLAY or $XAUTHORITY yet, and there's no Xorg yet anyway – there's no display to open.

 

Any ideas or pointers on how to properly start devilspie2 under a user systemd instance?

Remove it from default.target and place a `systemctl --user start devilspie2` in your session's normal autostart files (e.g. ~/.config/autostart/*.desktop for GNOME).

--

Mantas Mikulėnas

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