<div dir="ltr"><div dir="ltr">On Sun, Sep 19, 2021 at 4:05 AM Ed Greshko <<a href="mailto:ed.greshko@greshko.com">ed.greshko@greshko.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Not a everyday systemd service writer....<br>
<br>
I've written a user service file to start an app on login. It works well for Xorg with Environment=DISPLAY=:0.<br>
<br>
But I've found that under Wayland the DISPLAY=:1 after a logout of Xorg and login to a<br>
Wayland session.<br>
<br>
What would be the proper way to get the DISPLAY environment varible use it as opposed<br>
to "hard" coding it?<br></blockquote><div><br></div><div>The proper way is to have <b>the desktop environment</b> upload DISPLAY (and whatever else is relevant, such as XAUTHORITY or WAYLAND_DISPLAY or XDG_SESSION_TYPE) into systemd --user, so that it would be automatically available to your service <b>without </b>doing anything special.</div><div><br></div><div>For example, <font face="monospace">gnome-session</font> does this for GNOME (it calls systemd's UnsetAndSetEnvironment in gsm-util.c), and <font face="monospace">/etc/X11/xinit/xinitrc.d/50-systemd-user.sh</font> handles the bare minimum for other Xorg-based desktops (when startx is used).</div><div><br></div><div>If KDE integrates with systemd --user in any way (i.e. if it actually has a "plasma-core.target" that you mention), I'd really expect it to do the same before it tries to start its own targets, otherwise they would be kind of useless.</div></div><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr">Mantas Mikulėnas</div></div></div>