Further digging around revealed https://c-nergy.be/blog/?p=13390 blog post.
==== So, there is a need to rebuild xrdp against HWE 18.04 on Ubuntu 18.04.2. Maybe Ubuntu should provide a new binary package, let’s say “xrdp- hwe-18.04″… For now, I’ve recompiled the same xrdp from Ubuntu 18.04, on Ubuntu 18.04.2 and uploaded to my “XRP PPA”, here: https://launchpad.net/~martinx/+archive/ubuntu/xrdp-hwe-18.04 To enjoy xrdp on Ubuntu 18.04 with HWE, just do: sudo add-apt-repository ppa:martinx/xrdp-hwe-18.04 sudo apt install xrdp xorgxrdp Bug report: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1817225 === In short the following steps resolved the issue: $ sudo add-apt-repository ppa:martinx/xrdp-hwe-18.04 $ sudo apt-get install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04 $ sudo apt-get install xrdp xorgxrdp xfonts-100dpi xfonts-75dpi $ sudo adduser xrdp ssl-cert $ grep ^X11Forwarding /etc/ssh/sshd_config X11Forwarding yes $ cat ~/.xsession #!/bin/sh /usr/bin/lxsession -s Lubuntu -e LXDE -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1923328 Title: xrdp wants to remove lubuntu-desktop on lubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xrdp/+bug/1923328/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs