I'm running Lubuntu 14.10. It seems that LighDM invokes
/etc/X11/Xsession only if directed to so by the user. In fact there is no shadow of it in
startxcommand line (wrapper around xinit for reasonable defaults) uses
~/.xinitrcif exists, otherwise uses
/etc/X11/Xsession, that redirects output to
~/.xsessionrcif exists, then executes
~/.xsessionif executable, sources if not.
What happens when using lightdm? If it doesn't source
/etc/X11/Xsession, how could it possibly redirect errors to error-file
~/.xsession-errors (I couldn't find any informations on other scripts in
The man page for Xsession documents
~/.xsession. It says that
~/.xsessionrc is only for setting variables and the
~/.xsession is for executing commands, but
~/.xsession gets sourced only if I create a custom
*.desktop file in
/usr/share/xsessions/ for it. Should I create a custom
/etc/X11/Xsession.d/ file (like
40x11-common_xsessionrc works for
~/.xsessionrc), or just use
~/.xsessionrc to add any scripts?
Also, I'd like to know how x-window-manager and x-session-manager work through alternatives. I noticed that they seem to work if no
~/.xsession exist, and apparently they work only when running startx.
Thanks in advance for any answers.