Xrdp shows black screen

Opensuse Tumbleweed.

xrdp version

sudo xrdp -v
xrdp 0.9.23.1
  A Remote Desktop Protocol Server.
  Copyright (C) 2004-2020 Jay Sorg, Neutrino Labs, and all contributors.
  See https://github.com/neutrinolabs/xrdp for more information.

  Configure options:
      --host=x86_64-suse-linux
      --build=x86_64-suse-linux
      --program-prefix=
      --disable-dependency-tracking
      --prefix=/usr
      --exec-prefix=/usr
      --bindir=/usr/bin
      --sbindir=/usr/sbin
      --sysconfdir=/etc
      --datadir=/usr/share
      --includedir=/usr/include
      --libdir=/usr/lib64
      --libexecdir=/usr/libexec
      --localstatedir=/var
      --sharedstatedir=/var/lib
      --mandir=/usr/share/man
      --infodir=/usr/share/info
      --enable-ipv6
      --enable-painter
      --with-systemdsystemunitdir=/usr/lib/systemd/system
      --with-pamconfdir=/usr/lib/pam.d
      --enable-vsock
      --enable-fuse
      build_alias=x86_64-suse-linux
      host_alias=x86_64-suse-linux
      CFLAGS=-O2 -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g
      LDFLAGS=-flto=auto
      PKG_CONFIG_PATH=:/usr/lib64/pkgconfig:/usr/share/pkgconfig

  Compiled with OpenSSL 3.1.4 24 Oct 2023

startwm.sh

#!/usr/bin/env bash
#
# This script is an example. You might need to edit this script
# depending on your distro if it doesn't work for you.
#
# Uncomment the following line for debug:
# exec xterm


# Execution sequence for interactive login shell - pseudocode
#
# IF /etc/profile is readable THEN
#     execute /etc/profile
# END IF
# IF ~/.bash_profile is readable THEN
#     execute ~/.bash_profile
# ELSE
#     IF ~/.bash_login is readable THEN
#         execute ~/.bash_login
#     ELSE
#         IF ~/.profile is readable THEN
#             execute ~/.profile
#         END IF
#     END IF
# END IF
pre_start()
{
  if [ -r /etc/profile ]; then
    . /etc/profile
  fi
  if [ -r ~/.bash_profile ]; then
    . ~/.bash_profile
  else
    if [ -r ~/.bash_login ]; then
      . ~/.bash_login
    else
      if [ -r ~/.profile ]; then
        . ~/.profile
      fi
    fi
  fi
  return 0
}

# When logging out from the interactive shell, the execution sequence is:
#
# IF ~/.bash_logout exists THEN
#     execute ~/.bash_logout
# END IF
post_start()
{
  if [ -r ~/.bash_logout ]; then
    . ~/.bash_logout
  fi
  return 0
}

#start the window manager
wm_start()
{
  if [ -r /etc/default/locale ]; then
    . /etc/default/locale
    export LANG LANGUAGE
  fi

  # debian
  if [ -r /etc/X11/Xsession ]; then
    pre_start
    . /etc/X11/Xsession
    post_start
    exit 0
  fi

  # alpine
  # Don't use /etc/X11/xinit/Xsession - it doesn't work
  if [ -f /etc/alpine-release ]; then
    if [ -f /etc/X11/xinit/xinitrc ]; then
        pre_start
        /etc/X11/xinit/xinitrc
        post_start
    else
        echo "** xinit package isn't installed" >&2
        exit 1
    fi
  fi

  # el
  if [ -r /etc/X11/xinit/Xsession ]; then
    pre_start
    . /etc/X11/xinit/Xsession
    post_start
    exit 0
  fi

  # suse
  if [ -r /etc/X11/xdm/Xsession ]; then
    # since the following script run a user login shell,
    # do not execute the pseudo login shell scripts
    . /etc/X11/xdm/Xsession
    exit 0
  elif [ -r /usr/etc/X11/xdm/Xsession ]; then
    . /usr/etc/X11/xdm/Xsession
    exit 0
  fi

  pre_start
  xterm
  post_start
}

#. /etc/environment
#export PATH=$PATH
#export LANG=$LANG

# change PATH to be what your environment needs usually what is in
# /etc/environment
#PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
#export PATH=$PATH

# for PATH and LANG from /etc/environment
# pam will auto process the environment file if /etc/pam.d/xrdp-sesman
# includes
# auth       required     pam_env.so readenv=1

wm_start

exit 1

xrdp.ini

[Globals]
; xrdp.ini file version number
ini_version=1

; fork a new process for each incoming connection
fork=true

; ports to listen on, number alone means listen on all interfaces
; 0.0.0.0 or :: if ipv6 is configured
; space between multiple occurrences
;
; Examples:
;   port=3389
;   port=unix://./tmp/xrdp.socket
;   port=tcp://.:3389                           127.0.0.1:3389
;   port=tcp://:3389                            *:3389
;   port=tcp://<any ipv4 format addr>:3389      192.168.1.1:3389
;   port=tcp6://.:3389                          ::1:3389
;   port=tcp6://:3389                           *:3389
;   port=tcp6://{<any ipv6 format addr>}:3389   {FC00:0:0:0:0:0:0:1}:3389
;   port=vsock://<cid>:<port>
port=3389

; 'port' above should be connected to with vsock instead of tcp
; use this only with number alone in port above
; prefer use vsock://<cid>:<port> above
use_vsock=false

; regulate if the listening socket use socket option tcp_nodelay
; no buffering will be performed in the TCP stack
tcp_nodelay=true

; regulate if the listening socket use socket option keepalive
; if the network connection disappear without close messages the connection will be closed
tcp_keepalive=true

; set tcp send/recv buffer (for experts)
#tcp_send_buffer_bytes=32768
#tcp_recv_buffer_bytes=32768

; security layer can be 'tls', 'rdp' or 'negotiate'
; for client compatible layer
security_layer=negotiate

; minimum security level allowed for client for classic RDP encryption
; use tls_ciphers to configure TLS encryption
; can be 'none', 'low', 'medium', 'high', 'fips'
crypt_level=high

; X.509 certificate and private key
; openssl req -x509 -newkey rsa:2048 -nodes -keyout key.pem -out cert.pem -days 365
certificate=
key_file=

; set SSL protocols
; can be comma separated list of 'SSLv3', 'TLSv1', 'TLSv1.1', 'TLSv1.2', 'TLSv1.3'
ssl_protocols=TLSv1.2, TLSv1.3
; set TLS cipher suites
#tls_ciphers=HIGH

; Section name to use for automatic login if the client sends username
; and password. If empty, the domain name sent by the client is used.
; If empty and no domain name is given, the first suitable section in
; this file will be used.
autorun=

allow_channels=true
allow_multimon=true
bitmap_cache=true
bitmap_compression=true
bulk_compression=true
#hidelogwindow=true
max_bpp=32
new_cursors=true
; fastpath - can be 'input', 'output', 'both', 'none'
use_fastpath=both
; when true, userid/password *must* be passed on cmd line
#require_credentials=true
; You can set the PAM error text in a gateway setup (MAX 256 chars)
#pamerrortxt=change your password according to policy at http://url

;
; colors used by windows in RGB format
;
blue=009cb5
grey=dedede
#black=000000
#dark_grey=808080
#blue=08246b
#dark_blue=08246b
#white=ffffff
#red=ff0000
#green=00ff00
#background=626c72

;
; configure login screen
;

; Login Screen Window Title
#ls_title=My Login Title

; top level window background color in RGB format
ls_top_window_bg_color=000000

; width and height of login screen
ls_width=350
ls_height=430

; login screen background color in RGB format
ls_bg_color=dedede

; optional background image filename (bmp format).
#ls_background_image=

; logo
; full path to bmp-file or file in shared folder
ls_logo_filename=
ls_logo_x_pos=55
ls_logo_y_pos=50

; for positioning labels such as username, password etc
ls_label_x_pos=30
ls_label_width=65

; for positioning text and combo boxes next to above labels
ls_input_x_pos=110
ls_input_width=210

; y pos for first label and combo box
ls_input_y_pos=220

; OK button
ls_btn_ok_x_pos=142
ls_btn_ok_y_pos=370
ls_btn_ok_width=85
ls_btn_ok_height=30

; Cancel button
ls_btn_cancel_x_pos=237
ls_btn_cancel_y_pos=370
ls_btn_cancel_width=85
ls_btn_cancel_height=30

[Logging]
LogFile=xrdp.log
LogLevel=ERROR
EnableSyslog=false
SyslogLevel=ERROR
; LogLevel and SysLogLevel could by any of: core, error, warning, info or debug

[Channels]
; Channel names not listed here will be blocked by XRDP.
; You can block any channel by setting its value to false.
; IMPORTANT! All channels are not supported in all use
; cases even if you set all values to true.
; You can override these settings on each session type
; These settings are only used if allow_channels=true
rdpdr=true
rdpsnd=true
drdynvc=true
cliprdr=true
rail=true
xrdpvr=true
tcutils=true

; for debugging xrdp, in section xrdp1, change port=-1 to this:
#port=/tmp/.xrdp/xrdp_display_10

; for debugging xrdp, add following line to section xrdp1
#chansrvport=/tmp/.xrdp/xrdp_chansrv_socket_7210


;
; Session types
;

; Some session types such as Xorg, X11rdp and Xvnc start a display server.
; Startup command-line parameters for the display server are configured
; in sesman.ini. See and configure also sesman.ini.
[Xvnc]
name=Xvnc
lib=libvnc.so
username=ask
password=ask
ip=127.0.0.1
port=-1
#xserverbpp=24
delay_ms=2000

[Xorg]
name=Xorg
lib=libxup.so
username=ask
password=ask
ip=127.0.0.1
port=-1
code=20

[vnc-any]
name=vnc-any
lib=libvnc.so
ip=ask
port=ask5900
username=na
password=ask
#pamusername=asksame
#pampassword=asksame
#pamsessionmng=127.0.0.1
#delay_ms=2000

[neutrinordp-any]
name=neutrinordp-any
lib=libxrdpneutrinordp.so
ip=ask
port=ask3389
username=ask
password=ask

; You can override the common channel settings for each session type
#channel.rdpdr=true
#channel.rdpsnd=true
#channel.drdynvc=true
#channel.cliprdr=true
#channel.rail=true
#channel.xrdpvr=true

I connect with Windows 10 Remote Desktop Connection.
After connecting, it shows a black screen with a console.

What results if from that terminal window you try?:

  • /usr/bin/icewm
  • /usr/bin/twm
  • /usr/bin/startplasma-x11

/usr/bin/icewm and /usr/bin/startplasma-x11 start desktop environments
/usr/bin/twm - error

I took the startwm.sh from Leap 15.6.
It works for me.

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