Why is my TightVNC server not displaying the LXQt desktop?
I am trying to setup a vnc server on my Lubuntu 20.04 / LXQt / LightDM / Xorg / openbox machine using TightVNC.
Describing my issue upfront: When I connect from Windows machine using TightVNC (java-version) I can connect, I can see my python app running ok, that I started locally on my Lubuntu machine, but I cannot see any desktop. All gray. My ~/.vnc/nb-lubuntu:1.log shows a lot of errors.
Here is my ~/.vnc/xstartup:
#!/bin/sh
unset SESSION_MANAGER
exec /etc/X11/xinit/xinitrc &
exec startx &
/usr/bin/openbox &
/usr/bin/startlxqtAnd this is my :1.log under .vnc with a bucket full of errors:
10/04/21 22:19:12 Copyright (C) 2000-2009 TightVNC Group
10/04/21 22:19:12 Copyright (C) 1999 AT&T Laboratories Cambridge
10/04/21 22:19:12 All Rights Reserved.
10/04/21 22:19:12 See for information on TightVNC
10/04/21 22:19:12 Desktop name 'X' (nb-lubuntu:1)
10/04/21 22:19:12 Protocol versions supported: 3.3, 3.7, 3.8, 3.7t, 3.8t
10/04/21 22:19:12 Listening for VNC connections on TCP port 5901
Font directory '/usr/share/fonts/X11/75dpi/' not found - ignoring
Font directory '/usr/share/fonts/X11/100dpi/' not found - ignoring
Obt-Message: XKB extension is not present on the server or too old
Obt-Message: Xinerama extension is not present on the server
Obt-Message: XRandR extension is not present on the server
qt.qpa.xcb: XKeyboard extension not present on the X server
/usr/lib/xorg/Xorg.wrap: Only console users are allowed to run the X server
Xlib: extension "XInputExtension" missing on display ":1".
Openbox-Message: Requested key "Print" does not exist on the display
Openbox-Message: Requested key "Print" does not exist on the display
Openbox-Message: Unable to find a valid menu file "/var/lib/openbox/debian-menu.xml"
** (light-locker:37818): ERROR **: 22:19:13.553: Environment variable XDG_SESSION_PATH not set. Is LightDM running?
[: 1: Syntax error: Unterminated quoted string
qt.qpa.xcb: XKeyboard extension not present on the X server
AUDIT: Sat Apr 10 22:19:13 2021: 37728 Xtightvnc: client 13 rejected from local host
Failure: Module initialization failed
qt.qpa.xcb: XKeyboard extension not present on the X server
qt.qpa.xcb: XKeyboard extension not present on the X server
qt.qpa.xcb: XKeyboard extension not present on the X server
qt.qpa.xcb: XKeyboard extension not present on the X server
blueman-applet version 2.1.2 starting
There is an instance already running
qt.qpa.xcb: XKeyboard extension not present on the X server
** (update-notifier:37905): WARNING **: 22:19:14.233: already running?
[Critical] Cannot register service 'org.lxqt.global_key_shortcuts'
[Notice] Stopped
(0x7fff1efdbfb0) Debug: New PolkitAgentListener 0x7fdccc003da0
(0x7fff1efdbfb0) Debug: Adding new listener PolkitQt1::Agent::Listener(0x7fff1efdbfc0) for 0x7fdccc003da0
qt.qpa.xcb: XKeyboard extension not present on the X server
qt.qpa.xcb: XKeyboard extension not present on the X server
qt.qpa.xcb: XKeyboard extension not present on the X server
An instance of qlipper is already running!
(0x7ffdc9104d50) Debug: registerService failed: another service with 'org.freedesktop.Notifications' runs already
QSystemTrayIcon::setVisible: No Icon set
(0x7fffca5aa4c0) Warning: Unable to register 'org.lxqt.lxqt-powermanagement' service - is another instance of lxqt-powermanagement running?
AUDIT: Sat Apr 10 22:19:15 2021: 37728 Xtightvnc: client 18 rejected from local host
(0x7fff0fbe8860) Debug: ""
(0x7fff0fbe8860) Debug: ()
(0x7ffc852f58c0) Debug: systemd: "CanHibernate" = "challenge"
(0x7ffc852f58c0) Debug: systemd: "CanSuspend" = "challenge"
(0x7fff0fbe8860) Debug: WinIdChange 3000006 handle QWidgetWindow(0x55e8cce84850, name="LXQtPanel panel1Window") QScreen(0x55e8ccd0c680, name=":1.0")
(0x7fff0fbe8860) Debug: Systray started
(0x7fff0fbe8860) Warning: The X11 connection broke (error 2). Did the X11 server die?
mount error(16): Device or resource busy
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg)
RandR extension missing
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: server error
Couldn't get a file descriptor referring to the console
X connection to :1 broken (explicit kill or server shutdown).
X connection to :1 broken (explicit kill or server shutdown).
Gdk-Message: 22:22:09.825: nm-applet: Fatal IO error 11 (Resource temporarily unavailable) on X server :1.
(0x7ffdf5f3f750) Warning: The X11 connection broke (error 1). Did the X11 server die?
(0x7fff1efdbfb0) Warning: The X11 connection broke (error 1). Did the X11 server die?
(0x7ffdc9104d50) Warning: The X11 connection broke (error 1). Did the X11 server die?
The X11 connection broke (error 1). Did the X11 server die?The last line mirrors my psychological condition currently. Apparently lxqt is not starting. My desktop is 'X' as a fallback? What am I doing wrong? Thanks for any help!
21 Answer
I finally found an alternative:
x2go.
It was easy to install it under lubuntu via
- sudo apt-get install software-properties-common
- sudo add-apt-repository ppa:x2go/stable
- sudo apt-get update sudo apt-get install x2goserver x2goserver-xsession
Then install the x2go client under Windows and configure session. Pretty self-explaining and desktop perfectly visible (copy of the existing desktop, no separate session).
