Ubuntu 22.04 LTS XRDP terminates with There is no X server active on display 10

Question

I did a fresh install of Ubuntu desktop 22.04 and installed XRDP.

After entering my credentials, the connection just terminates. here is the relevant output from syslog:

Nov 20 16:05:37 ubuntuserver xrdp-sesman[5092]: [INFO ] [session start] (display 10): calling auth_start_session from pid 5092

Nov 20 16:05:37 ubuntuserver xrdp-sesman[5074]: [ERROR] sesman_data_in: scp_process_msg failed

Nov 20 16:05:37 ubuntuserver xrdp[5091]: [INFO ] xrdp_wm_log_msg: login successful for display 10

Nov 20 16:05:37 ubuntuserver xrdp[5091]: [INFO ] login successful for display 10

Nov 20 16:05:37 ubuntuserver xrdp-sesman[5074]: [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans

Nov 20 16:05:37 ubuntuserver xrdp[5091]: [INFO ] loaded module 'libxup.so' ok, interface size 10296, version 4

Nov 20 16:05:37 ubuntuserver xrdp[5091]: [INFO ] started connecting

Nov 20 16:05:37 ubuntuserver xrdp[5091]: [INFO ] lib_mod_connect: connecting via UNIX socket

Nov 20 16:05:37 ubuntuserver systemd[1]: Started Session c7 of User username.

Nov 20 16:05:37 ubuntuserver xrdp-sesman[5094]: [INFO ] Starting X server on display 10: /usr/bin/Xorg :10 -auth .Xauthority -config xrdp/xorg.conf -noreset -nolisten tcp -logfile .xorgxrdp.%>

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [WARN ] Timed out waiting for X server on display 10 to startup

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] Session started successfully for user username on display 10

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5098]: [INFO ] Starting the xrdp channel server for display 10

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] Session in progress on display 10, waiting until the window manager (pid 5093) exits to end the session

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5093]: [WARN ] Timed out waiting for X server on display 10 to startup

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5093]: [ERROR] There is no X server active on display 10

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5093]: [ERROR] A fatal error has occured attempting to start the window manager on display 10, aborting connection

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [WARN ] Window manager (pid 5093, display 10) exited quickly (0 secs). This could indicate a window manager config problem

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] Calling auth_stop_session and auth_end from pid 5092

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] Terminating X server (pid 5094) on display 10

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] Terminating the xrdp channel server (pid 5098) on display 10

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] X server on display 10 (pid 5094) returned exit code 1 and signal number 0

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] xrdp channel server for display 10 (pid 5098) exit code 0 and signal number 0

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5092]: [INFO ] cleanup_sockets:

Nov 20 16:05:47 ubuntuserver systemd[1]: session-c7.scope: Deactivated successfully.

Nov 20 16:05:47 ubuntuserver xrdp-sesman[5074]: [INFO ] ++ terminated session:  username username, display :10.0, session_pid 5092, ip ::ffff:192.168.1.101:59428 - socket: 12
Timed out waiting for X server on display 10 to startupNov 20 16:06:09 ubuntuserver wpa_supplicant[1219]: wlp5s0: CTRL-EVENT-BEACON-LOSS

Nov 20 16:06:11 ubuntuserver systemd-timesyncd[1127]: Timed out waiting for reply from [2620:2d:4000:1::40]:123 (ntp.ubuntu.com).

Nov 20 16:06:21 ubuntuserver systemd-timesyncd[1127]: Timed out waiting for reply from [2620:2d:4000:1::41]:123 (ntp.ubuntu.com).


Nov 20 16:06:31 ubuntuserver systemd-timesyncd[1127]: Timed out waiting for reply from [2620:2d:4000:1::3f]:123 (ntp.ubuntu.com).

Nov 20 16:06:31 ubuntuserver systemd-timesyncd[1127]: Initial synchronization to time server 185.125.190.57:123 (ntp.ubuntu.com).

Nov 20 16:07:25 ubuntuserver wpa_supplicant[1219]: wlp5s0: CTRL-EVENT-BEACON-LOSS

Nov 20 16:09:07 ubuntuserver xrdp[5091]: [INFO ] connection problem, giving up

Nov 20 16:09:07 ubuntuserver xrdp[5091]: [INFO ] some problem

Answer 1

Finally figured it out: In /etc/X11/Xwrapper.config I changed allowed_users to anybody, and the X server which is started earlier in the sequence will keep on running:

Change this:

#allowed_users=console

to this:

allowed_users=anybody