I have multiple desktop environments installed, like kubuntu-desktop, lubuntu-desktop. Also I need to switch between these desktops frequently. So is there any possible way that I don't need to log out and log back in to switch my desktop from gnome to kubuntu?
Maybe it will help you: I'm currently running KDE but have LXDE installed, and I managed to launch LXDE panel and some services with just typing startlxde command. However, this doesn't close KDE's panels, so I would have to kill them manually (with killall plasma-desktop or so).
I also managed to launch RazorQt with startrazor.
Unfortunately, I'm not sure whether all DEs provide such bootstrap commands. Xfce4, for example, provides startxfce4, but it can't be run within an existing X session.
Anyway, I think you don't need to run the whole DE. Try starting just window manager and desktop, e.g. kwin --replace and plasma-desktop for KDE.
P.S. Kubuntu is not a DE. KDE is a DE. :-)
