[LightDM] Multiple logins

[Dave Flogeras]

Hi, I am upgrading from kde4 to plasma5 on Gentoo, and since sddm doesn't
support XDMCP I am trying lightdm.  I use XDMCP so that I can log in
remotely through the display manager over VNC/xinetd.

On this machine I usually leave myself logged in locally, but from time to
time I need to log in over VNC when I am not home.  KDM allowed me to log
in to my account, and usually I'd select a lighter DM (like LXDE/LXQT) both
to save bandwidth (my KDE desktop is more 'busy') and to also not confuse
KDE by logging in twice as the same user.

If I try to do this with lightdm, when I select my user, it only offers me
the choice to "Unlock" which tries to shanghai my current local session.  I
cannot start a new session.  Is there a way to work around this?  Of course
I can create another user, or remotely tell plasma to log me out via
something like qdbus, but I'd prefer not to do either if I can help it.

Thanks
Dave
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