Not fully understanding the issue...but if the problem is that when you remote login via xrdp, you have the default gnome desktop interface....this is expected if you have simply installed xrdp package using sudo apt-get install xrdp
After installing xrdp on ubuntu, you need to perform some post actions configuration in order to have something that look like the Ubuntu desktop... So in a nutshell, you need to perform the following
Step 1 - create a file that will configure your desktop within the remote session
Simply issue the following command within the session of the user that will be performing the remote session
touch ~/.xsessionrc
Then populate this file with the following content (assuming you are using Ubuntu desktop - the one with the Dock on the left side)
export GNOME_SHELL_SESSION_MODE=ubuntu
export XDG_CURRENT_DESKTOP=ubuntu:GNOME
export XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg
Step 2 - Configure Polkit to avoid repetitive popup
You will also need to create some other files to avoid annoying authentication popup. This was the file you created originally and it is needed to avoid repetitive popups... This is not breaking your look and feel...but tackle some security settings on your ubuntu system
Open a terminal console on your ubuntu and copy/paste this code below
sudo bash -c "cat >/etc/polkit-1/localauthority/50-local.d/45-allow-colord.pkla" <<EOF
[Allow Colord all Users]
Identity=unix-user:*
Action=org.freedesktop.color-manager.create-device;org.freedesktop.color-manager.create-profile;org.freedesktop.color-manager.delete-device;org.freedesktop.color-manager.delete-profile;org.freedesktop.color-manager.modify-device;org.freedesktop.color-manager.modify-profile
ResultAny=no
ResultInactive=no
ResultActive=yes
EOF
After that, you should be good to go and have something similar to the your desktop
An important point- you cannot have the same user connecting at the same time locally on the machine and remotely. So, if you need to remote connect with userA, ensure that userA is not locally connected on Ubuntu machine
Finally, please note that we have developed a small script that ease installation and configuration of xrdp on Ubuntu. If you want to give it a try, you can have a look at our blog and test it (see this post for all instructions)
Hope this help Till next time