I did not to start a full desktop (gnome) in ubuntu 18.04. It is just disconnected.

It turned out to start separately the Firefox and OpenOffice applications. It works quickly!

Slowly works when I give a desktop.

As I wrote before the application (firefox, openoffice) work quickly everywhere. LinuxLite 3.8/LinuxLite 4.2/Ubuntu 18.04

When I understood it I decided to change default style (Adapta) and icon theme (Papirus-Adapta) in LinLite 4.2 for others (did on the server not through x2go). After having connected by this user through x2go I found out that everything works quickly.

I decided to double-check it. And again changed style and icons for default (Adapta)

I very much was surprised, but everything continued to work quickly and well. I several times perezagrugit the x2go server every time being connected to it by the same user again and everything works quickly with windows and linux of clients.

After I was connected from the thin client of TCE by the same user and all very slowly.

Now I have such stable results with the user of "test" (Settings of clients identical):

Windows client = quickly

Linux client = quickly

Thin client of TCE = very slowly

Connection by any users not of "test" (Tried to change styles and icons):

Windows client = very slowly

Linux client = very slowly

Thin client of TCE = very slowly

I could not repeat magic which turned out with the user of "test" with other users. I cannot understand dependence in what prevents the x2go server to work quickly.

But I was convinced that x2go the server can quickly work with linux Lite 4.2

Maybe somebody will prompt what in my case prevents x2go to work quickly?

Or there can be I am mistaken what the style of a design and style of icons is guilty?

There are ideas?