Proper sudoers user / session setup for xrdp and systemd-modules-load / auditd fails in a WSL2 openSUSE-Leap-15.2 environment

Question

I've managed it to successfully run xrdp in an openSUSE-Leap-15.2 WSL 2 Linux subsystem on my Windows 10 64 PC.

My Linux knowledge is not that great.

I use KDE ( startplasma-x11 ) as desktop for xrdp.

On my first setup I had no systemd and only a dbus-daemon . As you know systemd and dbus are disabled / broken on WSL. Without systemd I had no issues with kdesu for eg yast2 in the KDE xrdp session. On the other hand, I couldn't use packages which require systemd to work properly.

My xrdp user is " marvin " as a default user group.

How ever I need openSUSE because I have an app which only run in suse well - not in Ubuntu .

So I started over again with this guide: Auto-start/services (systemd and snap support)

To get it working on leap 15.2 I did the following:

1. Downloaded & reinstalled dbus-1: dbus-1-1.12.2-lp152.5.27.x86_64.rpm

2. Yast install policykit-1

3. Grabbed daemonize-1.7.8-1-omv4000.x86_64.rpm and extracted bin daemonize to "/usr/sbin/"

Then I modified /usr/bin/bash and added also xrdp to autostart at the same time outside systemd:

#!/bin/bash
printf "\n"
echo "Starting init bash..."

# your WSL2 username
UNAME="marvin"

# fake run for dbus, just in case
if ! [ -d "/run/dbus" ]
then
    mkdir /run/dbus
    chmod 777 /run/dbus
fi

UUID=$(id -u "${UNAME}")
UGID=$(id -g "${UNAME}")
UHOME=$(getent passwd "${UNAME}" | cut -d: -f6)
USHELL=$(getent passwd "${UNAME}" | cut -d: -f7)

if [[ -p /dev/stdin || "${BASH_ARGC}" > 0 && "${BASH_ARGV[1]}" != "-c" ]]; then
    USHELL=/bin/bash
fi

if [[ "${PWD}" = "/root" ]]; then
    cd "${UHOME}"
fi

# get pid of systemd
SYSTEMD_PID=$(pgrep -xo systemd)

# if we're already in the systemd environment
if [[ "${SYSTEMD_PID}" -eq "1" ]]; then
    exec "${USHELL}" "$@"
fi

# start systemd if not started
# wait for systemd to start
# add echo feedback and timeout to avoid infinite loop
sto=50 # 5 secs
if [[ "${SYSTEMD_PID}" = "" ]]; then
    echo -e "Starting systemd PID ${SYSTEMD_PID} max timeout: $((sto/10))s"
    /usr/sbin/daemonize -l "${HOME}/.systemd.lock" /usr/bin/unshare -fp --mount-proc /usr/lib/systemd/systemd --system-unit=basic.target
fi
while [[ "${SYSTEMD_PID}" = "" && $sto -gt 0 ]]; do
    sleep 0.1
    ((sto--))
    SYSTEMD_PID=$(pgrep -xo systemd)
done
if [ "$sto" -eq "0" ]; then
    echo "Timeout while waiting for systemd PID. Exiting bash now...";
    exit 1;
fi

printf "\n"
echo -e "Checking xrdp status..."
printf "\n"
if ! ps -C xrdp-sesman
then
  sto=20
  echo -e "Starting xrdp session manager...  max timeout: $((sto/10))s"
  [ -f /var/run/xrdp-sesman.pid ] && rm /var/run/xrdp-sesman.pid
  xrdp-sesman
  while ! ps -C xrdp-sesman > /dev/null && [ $sto -gt 0 ]; do
    sleep 0.1
    ((sto--))
  done
  if [ "$sto" -eq "0" ]; then
    echo "Timeout while waiting for xrdp-sesman PID.";
  fi
fi
printf "\n"
if ! ps -C xrdp
then
  sto=20
  echo -e "Starting xrdp...  max timeout: $((sto/10))s"
  [ -f /var/run/xrdp.pid ] && rm /var/run/xrdp.pid
  yes "" | openssl req -x509 -newkey rsa:2048 -nodes -keyout /etc/xrdp/key.pem -out /etc/xrdp/cert.pem -days 365 > /dev/null 2>&1
  xrdp -f
  while ! ps -C xrdp > /dev/null && [ $sto -gt 0 ]; do
    sleep 0.1
    ((sto--))
  done
  if [ "$sto" -eq "0" ]; then
    echo "Timeout while waiting for xrdp PID.";
  fi
fi

printf "\n"
echo "Init bash done."
printf "\n"

# enter systemd namespace
exec /usr/bin/nsenter -t "${SYSTEMD_PID}" -m -p --wd="${PWD}" /usr/sbin/runuser -s "${USHELL}" "${UNAME}" -- "${@}"

After that I:

• Installed some packages via yast like xorg, KDE patterns, yast2 patterns, and so on.
• Successfully connected via rdp localhost:3390 Xorg session to KDE desktop from Windows with user " marvin ".

So what's not working is yast2 kde su :

• Where password is no typo for sure;)
• Permission denied
• I've got no wheel user group so far. I don't know if I had one last time but I don't think so.

How ever, I followed this guide to create a wheel user:

    id marvin
       uid=1000(marvin) gid=100(users) groups=1000(wheel),100(users)

My /etc/sudoers

    # Host_Alias    WEBSERVERS = www1, www2, www3
    
    # User_Alias    ADMINS = millert, dowdy, mikef
    
    # Cmnd_Alias    PROCESSES = /usr/bin/nice, /bin/kill, /usr/bin/renice, \
    #               /usr/bin/pkill, /usr/bin/top
    # Cmnd_Alias    REBOOT = /sbin/halt, /sbin/reboot, /sbin/poweroff
    
    Defaults always_set_home
    ## Path that will be used for every command run from sudo
    Defaults secure_path="/usr/sbin:/usr/bin:/sbin:/bin"
    Defaults env_reset
    Defaults env_keep = "LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE LC_ATIME LC_ALL LANGUAGE LINGUAS XDG_SESSION_COOKIE"
    
    #Defaults env_keep = "LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE LC_ATIME LC_ALL LANGUAGE LINGUAS XDG_SESSION_COOKIE"
    
    ## Do not insult users when they enter an incorrect password.
    Defaults !insults
    
    # Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
    
    # Defaults mail_badpass
    
    # Defaults log_output
    # Defaults!/usr/bin/sudoreplay !log_output
    # Defaults!REBOOT !log_output
    
    Defaults targetpw   # ask for the password of the target user i.e. root
    ALL   ALL=(ALL) ALL   # WARNING! Only use this together with 'Defaults targetpw'!
    
    ##
    ## Runas alias specification
    ##
    
    ##
    ## User privilege specification
    ##
    root ALL=(ALL) ALL
    
    ## Uncomment to allow members of group wheel to execute any command
    # %wheel ALL=(ALL) ALL
    
    ## Same thing without a password
    # %wheel ALL=(ALL) NOPASSWD: ALL
    
    ## Read drop-in files from /etc/sudoers.d
    ## (the '#' here does not indicate a comment)
    #includedir /etc/sudoers.d

And my /etc/sudoers.d/wheel-users

    # allow members of group wheel to execute any command
    %wheel ALL=(ALL) ALL

Well I'm out of my Linux knowledge at this point. I don't want to comment out things when I don't know if I break security rules if I do so. And also I don't know if the problem is caused by this. How ever adding wheel group didn't solve to problem. Maybe I missed something or did something wrong.?

I also noticed that some systemd services are not running and may affect this problem:

    service -s

Output:

    accounts-daemon.service              loaded active running Accounts Service
    
    avahi-daemon.service                 loaded active running Avahi mDNS/DNS-SD Stack
    colord.service                       loaded active running Manage, Install and Generate Color Profiles
    cron.service                         loaded active running Command Scheduler
    cups.service                         loaded active running CUPS Scheduler
    dbus.service                         loaded active running D-Bus System Message Bus
    detect-part-label-duplicates.service loaded active exited  Detect if the system suffers from bsc#1089761
    display-manager.service              loaded failed failed  X Display Manager
    dracut-shutdown.service              loaded active exited  Restore /run/initramfs on shutdown
    getty@tty1.service                   loaded active running Getty on tty1
    irqbalance.service                   loaded active running irqbalance daemon
    iscsi.service                        loaded active exited  Login and scanning of iSCSI devices
    kbdsettings.service                  loaded active exited  Apply settings from /etc/sysconfig/keyboard
    klog.service                         loaded active exited  Early Kernel Boot Messages
    lvm2-monitor.service                 loaded active exited  Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling
    ModemManager.service                 loaded active running Modem Manager
    nscd.service                         loaded active running Name Service Cache Daemon
    polkit.service                       loaded active running Authorization Manager
    postfix.service                      loaded active running Postfix Mail Transport Agent
    rsyslog.service                      loaded active running System Logging Service
    systemd-journal-flush.service        loaded active exited  Flush Journal to Persistent Storage
    systemd-journald.service             loaded active running Journal Service
    systemd-logind.service               loaded active running Login Service
    
    systemd-random-seed.service          loaded active exited  Load/Save Random Seed
    systemd-remount-fs.service           loaded active exited  Remount Root and Kernel File Systems
    systemd-sysctl.service               loaded active exited  Apply Kernel Variables
    systemd-tmpfiles-setup-dev.service   loaded active exited  Create Static Device Nodes in /dev
    systemd-tmpfiles-setup.service       loaded active exited  Create Volatile Files and Directories
    systemd-udev-settle.service          loaded active exited  udev Wait for Complete Device Initialization
    systemd-udev-trigger.service         loaded active exited  udev Coldplug all Devices
    systemd-udevd.service                loaded active running udev Kernel Device Manager
    systemd-update-utmp.service          loaded active exited  Update UTMP about System Boot/Shutdown
    systemd-user-sessions.service        loaded active exited  Permit User Sessions
    udisks2.service                      loaded active running Disk Manager
    upower.service                       loaded active running Daemon for power management
    user-runtime-dir@0.service           loaded active exited  User Runtime Directory /run/user/0
    user@0.service                       loaded active running User Manager for UID 0
    wicked.service                       loaded active exited  wicked managed network interfaces
    wickedd-auto4.service                loaded active running wicked AutoIPv4 supplicant service
    wickedd-dhcp4.service                loaded active running wicked DHCPv4 supplicant service
    wickedd-dhcp6.service                loaded active running wicked DHCPv6 supplicant service
    wickedd-nanny.service                loaded active running wicked network nanny service
    wickedd.service                      loaded active running wicked network management service daemon

Where console output s this relevant information:

    auditctl -e1
        Error - audit support not in kernel
        Cannot open netlink audit socket
    
    hostnamectl | grep Kernel
        Kernel: Linux 4.19.128-microsoft-standard
    
    systemctl -l status systemd-modules-load.service
        ● systemd-modules-load.service - Load Kernel Modules
        Loaded: loaded (/usr/lib/systemd/system/systemd-modules-load.service; static; vendor preset: disabled)
        Active: failed (Result: exit-code) since Thu 2020-11-26 13:57:11 CET; 12min ago
        Docs: man:systemd-modules-load.service(8)
        man:modules-load.d(5)
        Process: 25 ExecStart=/usr/lib/systemd/systemd-modules-load (code=exited, status=1/FAILURE)
        Main PID: 25 (code=exited, status=1/FAILURE)
        
        Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.

Further /var/log :

• audit.log is empty
• xrdp-sesman.log running well somehow

    [CORE ] waiting for window manager (pid 1304) to exit
    [ERROR] bind_loopback(4, 3350) failed; IPv6 ::1 (errno=98), IPv4 127.0.0.1 (errno=22) and IPv6 ::FFFF:127.0.0.1 (errno=98).
    [ERROR] Failed to start xrdp-sesman daemon, possibly address already in use.
    [CORE ] window manager (pid 1304) did exit, cleaning up session

• Warn looks crazy; I hope I can solve some of this errors sooner or later. I feel bad about this log since I never hacked all that in a way. ;/

    systemd-modules-load[27]: Failed to lookup alias 'scsi_dh_alua': Function not implemented
    systemd-modules-load[27]: Failed to lookup alias 'scsi_dh_emc': Function not implemented
    systemd-modules-load[27]: Failed to lookup alias 'scsi_dh_rdac': Function not implemented
    systemd-modules-load[27]: Failed to lookup alias 'dm-multipath': Function not implemented
    systemd-modules-load[27]: Failed to lookup alias 'sg': Function not implemented
    systemd-sysctl[52]: Failed to open file '/boot/sysctl.conf-4.19.128-microsoft-standard', ignoring: No such file or directory
    systemd-udevd[83]: Could not generate persistent MAC address for dummy0: No such file or directory
    systemd-udevd[68]: Could not generate persistent MAC address for bond0: No such file or directory
    systemd[1]: Failed to start Security Auditing Service.
    systemd[1]: auditd.service: Failed with result 'exit-code'.
    kernel: [    0.155516] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
    kernel: [    0.155516] TAA CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html for more details.
    kernel: [    0.264873] PCI: Fatal: No config space access function found
    kernel: [    0.277895] PCI: System does not support PCI
    kernel: [    0.155516]   #2  #3  #4  #5  #6  #7  #8  #9 #10 #11
    kernel: [    0.291373] kvm: no hardware support
    kernel: [    0.291374] kvm: no hardware support
    kernel: [    0.312696] hv_utils: cannot register PTP clock: 0
    kernel: [    0.312707] dxgk:err: dxg_drv_init  Version: 1
    kernel: [    0.322371] Unstable clock detected, switching default tracing clock to "global"
    kernel: [    0.322371] If you want to keep using the local clock, then add:
    kernel: [    0.322371]   "trace_clock=local"
    kernel: [    0.322371] on the kernel command line
    kernel: [    0.906590] FS-Cache: Duplicate cookie detected
    kernel: [    0.906592] FS-Cache: O-cookie c=00000000daf1a0fc [p=0000000032b95ae1 fl=222 nc=0 na=1]
    kernel: [    0.906592] FS-Cache: O-cookie d=00000000d9a94301 n=000000002cec00fb
    kernel: [    0.906593] FS-Cache: O-key=[10] '34323934393337333731'
    kernel: [    0.906594] FS-Cache: N-cookie c=0000000013092984 [p=0000000032b95ae1 fl=2 nc=0 na=1]
    kernel: [    0.906595] FS-Cache: N-cookie d=00000000d9a94301 n=00000000b63ed825
    kernel: [    0.906595] FS-Cache: N-key=[10] '34323934393337333731'
    kernel: [    0.908315] FS-Cache: Duplicate cookie detected
    kernel: [    0.908317] FS-Cache: O-cookie c=00000000daf1a0fc [p=0000000032b95ae1 fl=222 nc=0 na=1]
    kernel: [    0.908317] FS-Cache: O-cookie d=00000000d9a94301 n=000000002cec00fb
    kernel: [    0.908317] FS-Cache: O-key=[10] '34323934393337333731'
    kernel: [    0.908319] FS-Cache: N-cookie c=000000004100e019 [p=0000000032b95ae1 fl=2 nc=0 na=1]
    kernel: [    0.908319] FS-Cache: N-cookie d=00000000d9a94301 n=00000000074b6ae8
    kernel: [    0.908320] FS-Cache: N-key=[10] '34323934393337333731'
    kernel: [    0.910004] FS-Cache: Duplicate cookie detected
    kernel: [    0.910006] FS-Cache: O-cookie c=00000000daf1a0fc [p=0000000032b95ae1 fl=222 nc=0 na=1]
    kernel: [    0.910006] FS-Cache: O-cookie d=00000000d9a94301 n=000000002cec00fb
    kernel: [    0.910007] FS-Cache: O-key=[10] '34323934393337333731'
    kernel: [    0.910008] FS-Cache: N-cookie c=000000006fbd91eb [p=0000000032b95ae1 fl=2 nc=0 na=1]
    kernel: [    0.910009] FS-Cache: N-cookie d=00000000d9a94301 n=00000000ced73ef6
    kernel: [    0.910009] FS-Cache: N-key=[10] '34323934393337333731'
    avahi-daemon[222]: Host name conflict, retrying with XXXX-XXXX-2
    accounts-daemon[613]: g_dbus_interface_skeleton_get_object_path: assertion 'G_IS_DBUS_INTERFACE_SKELETON (interface_)' failed
    startproc: startproc:  exit status of parent of /usr/sbin/lightdm: 1
    systemd[1]: Failed to start X Display Manager.
    systemd[1]: display-manager.service: Failed with result 'exit-code'.
    xrdp-sesman: pam_systemd(xrdp-sesman:session): Failed to connect to system bus: No such file or directory
    kdeinit5[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    klauncher[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    klauncher[0]: message repeated 3 times: [ QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin']
    klauncher[0]: Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
    klauncher[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: message repeated 3 times: [ QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin']
    kaccess[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: QObject::connect: No such signal QDBusAbstractInterface::StateChanged(uint)
    kglobalaccel5[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kglobalaccel5[0]: message repeated 3 times: [ QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin']
    ksmserver[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    ksmserver[0]: message repeated 2 times: [ QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin']
    ksmserver[0]: Qt: Session management error: networkIdsList argument is NULL
    ksmserver[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: org.kde.bluez: Cannot open /dev/rfkill for reading!
    baloo_file[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    xembedsniproxy[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    polkit-kde-authentication-agent-1[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    udisksd[692]: Can't load configuration file /etc/udisks2/udisks2.conf
    kded5[0]: print-manager.kded: unable to register service to dbus
    udisksd[692]: Error statting /swap/file: No such file or directory
    plasmashell[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    polkit-kde-authentication-agent-1[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    plasmashell[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kwin_x11[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    polkit-kde-authentication-agent-1[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: org.kde.wacomtablet.common: d->name.isEmpty? true
    plasmashell[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kwin_x11[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: kf5.kded: found kded module "colord" by prepending 'kded_' to the library path, please fix your metadata.
    polkit-kde-authentication-agent-1[0]: "Cannot create unix session: No session for pid 925"
    polkit-kde-authentication-agent-1[0]: "Cannot register authentication agent!"
    polkit-kde-authentication-agent-1[0]: Couldn't register listener!
    gmenudbusmenuproxy[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: message repeated 2 times: [ QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin']
    kdeconnectd[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kactivitymanagerd[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kactivitymanagerd[0]: message repeated 2 times: [ QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin']
    kwin_x11[0]: kf5.kconfig.core: "\"fsrestore1\" - conversion of \"0,0,0,0\" to QRect failed"
    drkonqi[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kdeconnectd[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: "/home/marvin/.local/share/icc/.." is not an ICC profile
    kded5[0]: "/home/marvin/.local/share/icc/." is not an ICC profile
    kdeconnectd[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    drkonqi[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: Unable to get EDID for output "rdp0"
    kded5[0]: Failed to register device: "failed to obtain org.freedesktop.color-manager.create-device auth"
    kded5[0]: Failed to create ICC profile on cmsCreateRGBProfile
    kscreen_backend_launcher[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    kded5[0]: "/home/marvin/.local/share/icc/.." is not an ICC profile
    kded5[0]: "/home/marvin/.local/share/icc/." is not an ICC profile
    kded5[0]: Unable to get EDID for output "rdp0"
    vncmanager-controller[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    org_kde_powerdevil[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    baloo_file[0]: QDBusConnection: name 'org.freedesktop.UDisks2' had owner '' but we thought it was ':1.21'
    drkonqi[0]: org.kde.drkonqi: Invalid pid specified
    vncmanager-controller[0]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-marvin'
    org_kde_powerdevil[0]: powerdevil: No outputs have backlight property
    org_kde_powerdevil[0]: powerdevil: Xrandr not supported, trying ddc, helper
    backlighthelper[719]: powerdevil: no kernel backlight interface found
    kded5[0]: Failed to register device: "failed to obtain org.freedesktop.color-manager.create-device auth"
    ....................................................................
    kded5[0]: message repeated 2 times: [ QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*]
    kdeconnectd[0]: The X11 connection broke (error 1). Did the X11 server die?
    kscreen_backend_launcher[0]: The X11 connection broke (error 1). Did the X11 server die?
    kglobalaccel5[0]: The X11 connection broke (error 1). Did the X11 server die?
    kactivitymanagerd[0]: The X11 connection broke (error 1). Did the X11 server die?
    kded5[0]: The X11 connection broke: I/O error (code 1)

• I got also a lightdm.log indicating that my Linux starts a session without a reason.

It looks like I have messed up session system

• Well if I would restart from beginning that same would happen again. So I want to go through it step by step.

Goals:

• Get kdesu working with my user marvin would be nice for GUI and tracking other issus
• Proper session / user setup for xrdp

So if you need additional infos I'll update the question. Even if I got better results.

Answer 1

The wsl2 needs to have absolute knowledge of linux. Otherwise you, I, have no chance to be successful.

So I stop this question because of: I have to learn more.