Update 'xrdp'

xrdp.md

@@ -16,4 +16,36 @@ Prerequisites to run this script:
 * Fresh installed Debian 11 machine with Nvidia GPU
 * **No** additional Nvidia driver installed!
 
-The script will install the latest Nvidia driver, CUDA and build latest xrdp and xorgxrdp.
+The script will install the latest Nvidia driver, CUDA and build latest xrdp and xorgxrdp.
+
+## Fixing "Authentication is required to create a color managed device" popup
+
+### What and Why
+
+This behavior is due to a software called PolKit.
+When you log in remotely, you have limited rights.
+
+For a detailed explanation, see [this](http://c-nergy.be/blog/?p=12073) post.
+This post also covers another popup that I didn't see in Debian 11.
+To get the full picture, also read the linked posts.
+
+### How to solve the problem
+
+Create the file
+
+```
+/etc/polkit-1/localauthority/50-local.d/45-allow-colord.pkla
+```
+
+with the following content
+
+```
+[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
+```
+
+You need root permissions to create files at this location!