I am trying to understand the layers of the Linux GUI system. I am running a netbook with Lubuntu, and I was told it's running LXDE as desktop environment. However, there are processes with 'gnome'. Aren't both incompatible? I thought that when I have one desktop environment, I could not run other desktop environments. There is also a process with XFCE, (power manager). Why is it running a process from another desktop environment?And how can I change any module of the graphical system? I have openbox and lightdm running. Could I try to install something different, lighter? (if that's possible at all).Is everything covered by these modules: x.org, openbox, x11, and LXDE? Respectively, display server, window manager, communication protocol, and desktop environment?How can I know what is running in a Linux system? Are there any command line commands to discover it?
Structure of graphical modules in Linux Lubuntu
x11;desktop environment;architecture