After a recent switch to LXDM, I wondered where LXDM read its sessions from and how to edit them or add my own. The solution was not nicely documented as far as I could tell, but easy enough in the end.
LXDM finds what it needs in the
.desktop files in the folder
(This is on Arch Linux, YMMV). You can either add your own files in this folder
or edit one of the ones present. Basic example of the structure of one of these
files is as follows.
[Desktop Entry] Encoding=UTF-8 Name=i3 Comment=improved dynamic tiling window manager Exec=i3 Type=XSession
i3 and Openbox both seem to use
XSession as the
Type here, while GNOME and
XFCE both have
Application. The specification would suggest
the correct thing to use. Not that GNOME or XFCE will have a much bigger file
with translations and all that, but this seems to be enough to get going.