Xfce panel plugins not available through xrdp

GordT

Hi folks. I'm a new Solus user (moved from MX and Mint) and I'm struggling with an issue. When I connect to Solus from my Windows 10 PC (Windows RDC client) through xrdp, the Xfce panel throws a popup error because the plugins are missing - all of them.

Using the 2025-01-26 release with XFCE desktop. Everything works fine when using the box directly/physically. I can run the panel - its just the plugins that won't load - so the panel has nothing on it. The popup reads:

Plugin "whiskermenu" could not be loaded, do you want to remove it from xfce4-panel configuration?

This plugin is in the current xfce4-panel configuration but could not be loaded, probably due to an installation issue. If you know what you are doing, you can remove it permanently, otherwise you'd better quit and make a backup of the current configuration using xfce4-panel-properties, before checking your installation and trying to start xfce4-panel again.

There are two buttons below it for "Remove" and "Quit". If I remove the plugin a new popup for the next plugin follows, and so on, until all the plugins I would normally have on the panel are exhausted. Quitting just stops trying to load the panel.

I've verified that the plugins are located in /usr/share/xfce4/panel/plugins/. And I didn't see them anywhere else.

I've spent a few hours on and off over the last few days looking for reports of this and digging for logs or other clues but I've come up empty. Note that I am technically inclined (I'm a software developer) but I don't have deep systems knowledge of Linux.

Otherwise, I'm really liking Solus, Any help/pointers would be appreciated.

alexanderzhirov

Hi @GordT
Today, I was setting up a virtual machine and also encountered this issue while configuring xrdp on it.
So far, we only have logs of this nature. We need to dig a bit deeper to find the problem.
I'll try to make time to identify the cause.

апр 24 03:13:18 solus xrdp[660]: [INFO ] Socket 12: AF_INET6 connection received from ::ffff:192.168.0.59 port 44090
апр 24 03:13:18 solus xrdp[1179]: [INFO ] Using default X.509 certificate: /etc/xrdp/cert.pem
апр 24 03:13:18 solus xrdp[1179]: [ERROR] Cannot read certificate file /etc/xrdp/cert.pem: No such file or directory
апр 24 03:13:18 solus xrdp[1179]: [INFO ] Using default X.509 key file: /etc/xrdp/key.pem
апр 24 03:13:18 solus xrdp[1179]: [ERROR] Cannot read private key file /etc/xrdp/key.pem: No such file or directory
апр 24 03:13:18 solus xrdp[1179]: [WARN ] Cannot accept TLS connections because certificate or private key file is not readable. certificate file: [/etc/xrdp/cert.pem], private key file: [/etc/xrdp/key.pem]
апр 24 03:13:18 solus xrdp[1179]: [INFO ] Security protocol: configured [RDP], requested [SSL|HYBRID|RDP], selected [RDP]
апр 24 03:13:18 solus xrdp[1179]: [INFO ] Connected client computer name: solus
апр 24 03:13:18 solus xrdp[1179]: [WARN ] Received [MS-RDPBCGR] TS_UD_HEADER type 0xc006 is unknown (ignored)
апр 24 03:13:18 solus xrdp[1179]: [WARN ] Received [MS-RDPBCGR] TS_UD_HEADER type 0xc00a is unknown (ignored)
апр 24 03:13:18 solus xrdp[1179]: [INFO ] xrdp_load_keyboard_layout: Keyboard information sent by the RDP client, keyboard_type:[0x04], keyboard_subtype:[0x00], keylayout:[0x00000409]
апр 24 03:13:18 solus xrdp[1179]: [INFO ] xrdp_load_keyboard_layout: model [] variant [] layout [us] options []
апр 24 03:13:18 solus xrdp[1179]: [INFO ] Non-TLS connection established from ::ffff:192.168.0.59 port 44090: with security level : high
апр 24 03:13:18 solus xrdp[1179]: [INFO ] xrdp_caps_process_pointer: client supports new(color) cursor
апр 24 03:13:18 solus xrdp[1179]: [INFO ] xrdp_process_offscreen_bmpcache: support level 1 cache size 7864320 MB cache entries 2000
апр 24 03:13:18 solus xrdp[1179]: [INFO ] xrdp_caps_process_codecs: RemoteFX, codec id 3, properties len 49
апр 24 03:13:18 solus xrdp[1179]: [WARN ] Client Capability: not enough orders supported by client, client wants off screen bitmap but offscreen bitmaps disabled
апр 24 03:13:18 solus xrdp[1179]: [INFO ] Loading keymap file /usr/share/defaults/xrdp/km-00000409.ini
апр 24 03:13:18 solus xrdp[1179]: [WARN ] local keymap file for 0x00000409 found and doesn't match built in keymap, using local keymap file
апр 24 03:13:18 solus xrdp[1179]: [INFO ] connecting to sesman on 127.0.0.1:3350
апр 24 03:13:18 solus xrdp-sesman[618]: [INFO ] Socket 12: AF_INET6 connection received from ::1 port 41314
апр 24 03:13:18 solus xrdp[1179]: [INFO ] xrdp_wm_log_msg: sesman connect ok
апр 24 03:13:18 solus xrdp[1179]: [INFO ] sesman connect ok
апр 24 03:13:18 solus xrdp[1179]: [INFO ] sending login info to session manager. Please wait...
апр 24 03:13:18 solus xrdp-sesman[618]: gkr-pam: unable to locate daemon control file
апр 24 03:13:18 solus xrdp-sesman[618]: gkr-pam: stashed password to try later in open session
апр 24 03:13:18 solus xrdp-sesman[618]: [INFO ] Terminal Server Users group is disabled, allowing authentication
апр 24 03:13:18 solus xrdp-sesman[618]: [INFO ] ++ created session (access granted): username user, ip ::ffff:192.168.0.59:44090 - socket: 12
апр 24 03:13:18 solus xrdp-sesman[618]: [INFO ] starting Xorg session...
апр 24 03:13:18 solus xrdp-sesman[618]: [INFO ] Starting session: session_pid 1182, display :10.0, width 1388, height 836, bpp 24, client ip ::ffff:192.168.0.59:44090 - socket: 12, user name user
апр 24 03:13:18 solus xrdp-sesman[1182]: [INFO ] [session start] (display 10): calling auth_start_session from pid 1182
апр 24 03:13:18 solus xrdp-sesman[618]: [ERROR] sesman_data_in: scp_process_msg failed
апр 24 03:13:18 solus xrdp[1179]: [INFO ] xrdp_wm_log_msg: login successful for user user on display 10
апр 24 03:13:18 solus xrdp[1179]: [INFO ] login successful for user user on display 10
апр 24 03:13:18 solus xrdp-sesman[1182]: pam_unix(xrdp-sesman:session): session opened for user user(uid=1000) by user(uid=0)
апр 24 03:13:18 solus kernel: audit: type=1006 audit(1745453598.494:155): pid=1182 uid=0 subj=unconfined old-auid=4294967295 auid=1000 tty=(none) old-ses=4294967295 ses=5 res=1
апр 24 03:13:18 solus kernel: audit: type=1300 audit(1745453598.494:155): arch=c000003e syscall=1 success=yes exit=4 a0=4 a1=7ffe1ffc26b0 a2=4 a3=0 items=0 ppid=618 pid=1182 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=5 comm="xrdp-sesman" exe="/usr/sbin/xrdp-sesman" subj=unconfined key=(null)
апр 24 03:13:18 solus kernel: audit: type=1327 audit(1745453598.494:155): proctitle="/usr/sbin/xrdp-sesman"
апр 24 03:13:18 solus xrdp-sesman[618]: [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans
апр 24 03:13:18 solus xrdp[1179]: [INFO ] loaded module 'libxup.so' ok, interface size 10296, version 4
апр 24 03:13:18 solus systemd-logind[555]: New session 5 of user user.
апр 24 03:13:18 solus xrdp[1179]: [INFO ] started connecting
апр 24 03:13:18 solus xrdp[1179]: [INFO ] lib_mod_connect: connecting via UNIX socket
апр 24 03:13:18 solus systemd[1]: Started session-5.scope - Session 5 of User user.
апр 24 03:13:18 solus xrdp-sesman[1182]: gkr-pam: gnome-keyring-daemon started properly and unlocked keyring
апр 24 03:13:18 solus xrdp-sesman[1190]: [INFO ] Starting X server on display 10: /usr/lib64/xorg-server/Xorg :10 -auth .Xauthority -config xrdp/xorg.conf -noreset -nolisten tcp -logfile .xorgxrdp.%s.log
апр 24 03:13:18 solus xrdp[1179]: [INFO ] lib_mod_log_peer: xrdp_pid=1179 connected to X11rdp_pid=1190 X11rdp_uid=1000 X11rdp_gid=1000 client_ip=::ffff:192.168.0.59 client_port=44090
апр 24 03:13:18 solus xrdp[1179]: [INFO ] connected ok
апр 24 03:13:18 solus xrdp-sesman[1189]: [INFO ] Found X server running at /tmp/.X11-unix/X10
апр 24 03:13:18 solus xrdp-sesman[1182]: [INFO ] Found X server running at /tmp/.X11-unix/X10
апр 24 03:13:18 solus xrdp-sesman[1189]: [INFO ] Found X server running at /tmp/.X11-unix/X10
апр 24 03:13:18 solus xrdp-sesman[1182]: [INFO ] Session started successfully for user user on display 10
апр 24 03:13:18 solus xrdp-sesman[1195]: [INFO ] Starting the xrdp channel server for display 10
апр 24 03:13:18 solus xrdp-sesman[1189]: [INFO ] Starting the default window manager on display 10: /usr/share/defaults/xrdp/startwm.sh
апр 24 03:13:18 solus xrdp-sesman[1182]: [INFO ] Session in progress on display 10, waiting until the window manager (pid 1189) exits to end the session
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ] Socket 12: AF_UNIX connection received
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ] sound_process_output_format:
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       wFormatNo       0
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       wFormatTag      WAVE_FORMAT_PCM
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       nChannels       2
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       nSamplesPerSec  44100
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       nAvgBytesPerSec 176400
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       nBlockAlign     4
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       wBitsPerSample  16
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       cbSize          0
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ] sound_process_output_format:
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       wFormatNo       1
апр 24 03:13:18 solus xrdp-chansrv[1195]: [INFO ]       wFormatTag      WAVE_FORMAT_PCM
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nChannels       2
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nSamplesPerSec  22050
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nAvgBytesPerSec 88200
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nBlockAlign     4
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       wBitsPerSample  16
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       cbSize          0
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ] sound_process_output_format:
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       wFormatNo       2
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       wFormatTag      WAVE_FORMAT_AAC
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nChannels       2
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nSamplesPerSec  44100
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nAvgBytesPerSec 12000
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nBlockAlign     4
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       wBitsPerSample  16
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       cbSize          0
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ] sound_process_output_format:
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       wFormatNo       3
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       wFormatTag      WAVE_FORMAT_OPUS
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nChannels       2
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nSamplesPerSec  44100
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nAvgBytesPerSec 176400
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       nBlockAlign     4
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       wBitsPerSample  16
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ]       cbSize          0
апр 24 03:13:19 solus xrdp-chansrv[1195]: [INFO ] sound_process_training: round trip time 3
апр 24 03:13:35 solus systemd[763]: Starting xfce4-notifyd.service - XFCE notifications service...
апр 24 03:13:35 solus spice-vdagent[1271]: vdagent started
апр 24 03:13:35 solus xfce4-notifyd[1267]: cannot open display: 
апр 24 03:13:35 solus systemd[763]: xfce4-notifyd.service: Main process exited, code=exited, status=1/FAILURE
апр 24 03:13:35 solus systemd[763]: xfce4-notifyd.service: Failed with result 'exit-code'.
апр 24 03:13:35 solus systemd[763]: Failed to start xfce4-notifyd.service - XFCE notifications service.
апр 24 03:13:35 solus polkitd[550]: Registered Authentication Agent for unix-session:5 (system bus name :1.58 [/usr/lib64/polkit-gnome/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.utf8)
апр 24 03:13:35 solus spice-vdagent[1271]: display: failed to call GetCurrentState from mutter over DBUS
апр 24 03:13:35 solus spice-vdagent[1271]:    error message: Cannot invoke method; proxy is for the well-known name org.gnome.Mutter.DisplayConfig without an owner, and proxy was constructed with the G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START flag
апр 24 03:13:35 solus systemd[763]: Starting xfce4-notifyd.service - XFCE notifications service...
апр 24 03:13:35 solus xfce4-notifyd[1310]: cannot open display: 
апр 24 03:13:35 solus systemd[763]: Started xfce4-notifyd.service - XFCE notifications service.
апр 24 03:13:35 solus systemd[763]: xfce4-notifyd.service: Main process exited, code=exited, status=1/FAILURE
апр 24 03:13:35 solus systemd[763]: xfce4-notifyd.service: Failed with result 'exit-code'.
апр 24 03:13:35 solus NetworkManager[547]: <info>  [1745453615.9137] agent-manager: agent[84f56ebb9614299c,:1.61/org.freedesktop.nm-applet/1000]: agent registered
апр 24 03:13:36 solus systemd[1]: bluetooth.service - Bluetooth service was skipped because of an unmet condition check (ConditionPathIsDirectory=/sys/class/bluetooth).

GordT

Thanks. At least I know it's not just me.

alexanderzhirov

@GordT I managed to find the cause. The issue is not with xfce itself but with how we launch it. By default, the session starts with the command /usr/bin/xfce4-session, which causes errors during session loading. The correct way is to start the session with /usr/bin/startxfce4.

The problem lies in the xrdp-xfce4-integration package, but for a temporary fix, follow these steps:

Create a directory in /etc to override the system one:

sudo mkdir -p /etc/xrdp

Override the window manager startup file:

sudo cat << EOF > /etc/xrdp/startwm.sh
#!/usr/bin/env bash

source /usr/share/defaults/etc/profile

exec /usr/bin/startxfce4
EOF

Grant execution permissions:

sudo chmod +x /etc/xrdp/startwm.sh

After completing these steps, your xfce session should start correctly.

I sent the changes to PR.

alfisya

This should be fixed now in unstable, thanks to @alexanderzhirov PR. If you want to try it now, you can do :

sudo eopkg it https://packages.getsol.us/unstable/x/xrdp-xfce4-integration/xrdp-xfce4-integration-0.1.0-2-1-x86_64.eopkg

Cheers!

GordT

Fantastic! Thanks to both of you - I have my panel fully working now.