I have a weird problem. I installed xrdp and tried it with GNOME, XFCE4, and even KDE Plasma — everything works fine when using Ubuntu with the English locale. However, after reinstalling Ubuntu with the Hungarian locale and reinstalling xrdp and the desktop environment, nothing works. When using XFCE4 with Remote Desktop, the session disconnects immediately after logging in with the correct credentials (I switched to XFCE using sudo update-alternatives --config x-session-manager). After rebooting the server, the GUI doesn't start, and even the CLI doesn’t appear — Ubuntu gets stuck in a boot loop where it repeatedly tries to start xrdp and shows only a flickering mouse cursor. I also tried with KDE and GNOME. KDE worked once — the desktop appeared, but RDP didn’t function. With GNOME, I had no mouse or keyboard input (sometimes neither). I’m 100% sure the issue is related to the Hungarian language setting, because everything works with the English locale. Is there any way to fix this? (I read that someone else had a similar issue with the Bulgarian version.)
Assuming that you are talking about teh client part, for start, make sure you are running xrdp under x11 and not wayland. You can also try connecting via vnc, but that needs a vnc server to be installed on the server or x11vnc if you want something to run manually. That means: conenct to the server via ssh, run x11vnc there, use a client like remmina to connect to the server's ip using vnc as protocol.