Remote Desktop - RDP blank screen and aborts after disconnect

Attention: I scrolled through a lot of questions and didn't find an answer, please don't mark this as duplicate! A similar question is already here, but sadly it didn't receive any answers.

I'm trying to connect from my Windows 10 PC to my Odroid XU4 and after the connections is successfully established (at least I assume so), the screen on my windows pc turns grey for a couple of seconds and then it disappears without any error message. I installed ´xrdp´ on my linux machine. Following are the 3 steps:

Insert Credentials:

Connection builds up:

Blank screen, shortly before silent abort:

##Abort##

EDIT This is the syslog-output:

Oct  3 08:25:18 odroid systemd[1]: Starting Session c4 of user odroid.
Oct  3 08:25:19 odroid org.a11y.Bus[2241]: Activating service name='org.a11y.atspi.Registry'
Oct  3 08:25:19 odroid org.a11y.Bus[2241]: Successfully activated service 'org.a11y.atspi.Registry'
Oct  3 08:25:19 odroid org.a11y.atspi.Registry[2283]: SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
Oct  3 08:25:19 odroid gnome-session[2197]: gnome-session-is-accelerated: No composite extension.
Oct  3 08:25:19 odroid gnome-session[2197]: gnome-session-check-accelerated: Helper exited with code 256
Oct  3 08:25:24 odroid gnome-session[2197]: gnome-session-is-accelerated: No composite extension.
Oct  3 08:25:24 odroid gnome-session[2197]: gnome-session-check-accelerated: Helper exited with code 256
Oct  3 08:25:24 odroid gnome-session[2197]: x-session-manager[2197]: WARNING: software acceleration check failed: Child process exited with code 1
Oct  3 08:25:24 odroid x-session-manager[2197]: WARNING: software acceleration check failed: Child process exited with code 1
Oct  3 08:25:24 odroid x-session-manager[2197]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Oct  3 08:25:24 odroid gnome-session[2197]: x-session-manager[2197]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Oct  3 08:25:24 odroid org.a11y.atspi.Registry[2283]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":10.0"
Oct  3 08:25:24 odroid org.a11y.atspi.Registry[2283]: after 11 requests (11 known processed) with 0 events remaining.
Oct  3 08:25:24 odroid org.gtk.vfs.Daemon[2241]: A connection to the bus can't be made
Oct  3 08:25:24 odroid org.gtk.vfs.Daemon[2241]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Oct  3 08:25:24 odroid org.a11y.Bus[2241]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.

Solution 1:

I found the solution, after putting this line into the terminal, it worked:

echo mate-session> ~/.xsession

If this doesn't help you, try the following command before:

sudo apt-get install mate-core

(I'm not sure but I used a pre-compiled modified ubuntu by hardkernel. Mate was the desktop envoirement, but I was able to "newly" install the mate-core, not just update the existing. Maybe this was problem.)

Solution 2:

solved: Type the following command:

sudo sed -i '/allowed_users=console/allowed_users=anybody/' /etc/X11/Xwrapper.config