VNC server/client setup on Debian 9 Stretch Linux. Details Lubos Rendek Debian 31 May 2017 Contents. The objective is to configure a basic client/server VNC setup on Debian 9 Stretch Linux Operating System and Software Versions. I have now tried it on a fresh install of Debian 8 (KDE), using both the default xstartup and the one given by Paul H, using no service but just giving the command 'tightvncserver -geometry 1024x768 -depth 24'. VNC (Virtual Network Computing) is a technology for remote desktop sharing. VNC enables the visual desktop display of one computer to be remotely viewed and controlled over a network connection. It is similar to MSTSC on windows. It uses the Remote Frame Buffer protocol (RFB) to remotely control.
I have done much research and attempted fixes on this issue, mostly involving tweaking the xstartup file. I've tried alternative VNC clients (UltraVNC and TightVNC) from a Windows 7 computer, with the same results for each client.
Basically, I get either a blank grey screen with only an arrow cursor, or a failure to connect at all.
I also tried a different VNC server (VNC4server) but abandoned that because, although I could connect, I got an error every time on the client window. And Tightvnc seems more widely used and user-supported.
I find that, almost regardless of what I put in the ~/.vnc/xstartup file (for example, even if it has just one line (startkde &) it will work if I specify 'root' as the VNC user. But then I'm logged in as root and I need instead to follow standard *nix practice of being logged in as a non-root user. So, the issue does appear to relate to privileges. However, I check for correct ownership and executable flags on files after every time I edit them.
I read somewhere that the latest Tightvnc server will not allow KDE desktop to be started if there is already a desktop session running on the host (user logged in), so I start the host machine without anyone logged in. I have configured Tightvnc server as a service.
My current xstartup file follows, but like I said, I have already attempted many variants of these lines, commenting out nearly everything, from suggestions gathered on the internet.
#!/bin/sh
# Uncomment the following two lines for normal desktop:
unset SESSION_MANAGER
exec /etc/X11/xinit/xinitrc &
# unset DBUS_SESSION_BUS_ADDRESS
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
x-terminal-emulator -geometry 80x24+10+10 -ls -title '$VNCDESKTOP Desktop' &
# x-window-manager &
exec startkde &
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Here is the service file, /lib/systemd/system/tightvncserver.service :
[Unit]
Description=TightVNC remote desktop server
After=sshd.service
[Service]
Type=dbus
ExecStart=/usr/bin/vncserver -geometry 1024x768 -depth 24 :1
User=vnc
Type=forking
[Install]
WantedBy=multi-user.target
Here is the log after one reboot of the host followed by one connection attempt:
14/03/16 01:37:46 Xvnc version TightVNC-1.3.9
14/03/16 01:37:46 Copyright (C) 2000-2007 TightVNC Group
14/03/16 01:37:46 Copyright (C) 1999 AT&T Laboratories Cambridge
14/03/16 01:37:46 All Rights Reserved.
14/03/16 01:37:46 See http://www.tightvnc.com/ for information on TightVNC
14/03/16 01:37:46 Desktop name 'X' (test:1)
14/03/16 01:37:46 Protocol versions supported: 3.3, 3.7, 3.8, 3.7t, 3.8t
14/03/16 01:37:46 Listening for VNC connections on TCP port 5901
/home/vnc/.vnc/xstartup: 12: /home/vnc/.vnc/xstartup: vncconfig: not found
x-terminal-emulator: Unknown option 'ls'.
x-terminal-emulator: Use --help to get a list of available command line options.
Error: cannot create directory '/tmp/ksocket-vncw1nXNU': File exists
startkde: Starting up..
kdeinit4: Aborting. bind() failed: Address already in use
Could not bind to socket '/tmp/ksocket-vncGcyXe4/kdeinit4__1'
14/03/16 01:38:09 Got connection from client 192.168.10.10
14/03/16 01:38:09 Using protocol version 3.8
14/03/16 01:38:14 Full-control authentication passed by 192.168.10.10
14/03/16 01:38:14 Pixel format for client 192.168.10.10:
14/03/16 01:38:14 32 bpp, depth 24, little endian
14/03/16 01:38:14 true colour: max r 255 g 255 b 255, shift r 16 g 8 b 0
14/03/16 01:38:14 no translation needed
14/03/16 01:38:14 Using hextile encoding for client 192.168.10.10
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding 19
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding 18
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding 17
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding 16
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding 10
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding 9
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding 8
14/03/16 01:38:14 Using compression level 6 for client 192.168.10.10
14/03/16 01:38:14 Enabling full-color cursor updates for client 192.168.10.10
14/03/16 01:38:14 Enabling cursor position updates for client 192.168.10.10
14/03/16 01:38:14 Using image quality level 6 for client 192.168.10.10
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -65530
14/03/16 01:38:14 Enabling LastRect protocol extension for client 192.168.10.10
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -223
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -32768
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -32767
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -32764
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -32766
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -32765
14/03/16 01:38:14 rfbProcessClientNormalMessage: ignoring unknown encoding -1063131698
14/03/16 01:38:43 Client 192.168.10.10 gone
14/03/16 01:38:43 Statistics:
14/03/16 01:38:43 key events received 0, pointer events 260
14/03/16 01:38:43 framebuffer updates 2, rectangles 5, bytes 776789
14/03/16 01:38:43 cursor shape updates 2, bytes 4920
14/03/16 01:38:43 cursor position updates 1, bytes 12
14/03/16 01:38:43 hextile rectangles 2, bytes 771857
14/03/16 01:38:43 raw bytes equivalent 6291480, compression ratio 8.151095
Any ideas?
[EDIT, 2014/03/14, 1409 UTC]: I forgot to mention that I had it working error-free with XFCE desktop. But I much prefer KDE, and I wish to get that working if at all possible.
[EDIT, 2014/03/14, 2216 UTC]: This is a follow-up to Paul H.'s suggestion, I'm putting it here because the mini-formatting of comments doesn't seem to allow blockquotes and images.
Thank you, that got me further. After I give the 'startkde &' command, the client window opens with a sensible-looking desktop that is starting to load and gets this far before closing (note the error message in top left):
The log is as follows:
14/03/16 21:32:11 Desktop name 'X' (test:1)
14/03/16 21:32:11 Protocol versions supported: 3.3, 3.7, 3.8, 3.7t, 3.8t
14/03/16 21:32:11 Listening for VNC connections on TCP port 5901
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
14/03/16 21:32:37 Got connection from client 192.168.10.10
14/03/16 21:32:37 Using protocol version 3.8
14/03/16 21:32:47 Full-control authentication passed by 192.168.10.10
14/03/16 21:32:47 Pixel format for client 192.168.10.10:
14/03/16 21:32:47 32 bpp, depth 24, little endian
14/03/16 21:32:47 true colour: max r 255 g 255 b 255, shift r 16 g 8 b 0
14/03/16 21:32:47 no translation needed
14/03/16 21:32:47 Using hextile encoding for client 192.168.10.10
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding 19
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding 18
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding 17
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding 16
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding 10
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding 9
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding 8
14/03/16 21:32:47 Using compression level 6 for client 192.168.10.10
14/03/16 21:32:47 Enabling full-color cursor updates for client 192.168.10.10
14/03/16 21:32:47 Enabling cursor position updates for client 192.168.10.10
14/03/16 21:32:47 Using image quality level 6 for client 192.168.10.10
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -65530
14/03/16 21:32:47 Enabling LastRect protocol extension for client 192.168.10.10
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -223
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -32768
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -32767
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -32764
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -32766
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -32765
14/03/16 21:32:47 rfbProcessClientNormalMessage: ignoring unknown encoding -1063131698
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
kbuildsycoca4 running..
kbuildsycoca4(989) KBuildSycoca::checkTimestamps: checking file timestamps
kbuildsycoca4(989) KBuildSycoca::checkTimestamps: timestamps check ok
kbuildsycoca4(989) kdemain: Emitting notifyDatabaseChanged ()
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Object::connect: No such signal org::freedesktop::UPower::DeviceAdded(QString)
Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QString)
QDBusConnection: name 'org.freedesktop.UDisks2' had owner ' but we thought it was ':1.11'
klauncher: Exiting on signal 15
knotify4: Fatal IO error: client killed
kded4: Fatal IO error: client killed
konsole: Fatal IO error: client killed
konsole(902) Konsole::SessionManager::~SessionManager: Konsole SessionManager destroyed with sessions still alive
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The first error message, ending with 'application may misbehave,' is supposed to be unimportant, from the bug reports I have seen. The rest, I'm not sure about.
Install Vnc Debian 8 Jessie
1 Answer
KDE works with tightvncserver on my system. Try this xstartup:
You should get a terminal window when you connect thru VNC. Then try startkde & from the terminal and see if it starts. If it doesn't, note what the error messages are in the terminal and go from there. If it does start, you can try adding startkde & to the end of the xstartup script and try again.
Here is a minimal xstartup that worked for me using vnc4server and xfce. You can add konsole & like before and change xfce4-session & to startkde &. I haven't tried it with KDE.
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This article will describe installing tigervncserver and connecting to GNOME3 desktop with VNC and XRDP.
Table of Contents
1 GNOME3 and tightvncserver cause error
GNOME3 and tightvncserver will cause error as below and cannot connect.
2 Preparation
Remove vnc4server and tightvncserver.
You can also switch vncserver to tigervncserver with update-alternatives command.
Install git and devscripts.
3 Install libfltk
A libfltk in Debian 8 is a little old and tigervncviewer will be compile error.
This article will port liblftk in Ubuntu 16.04 to Debian 8.
Install packages for building libfltk.
Download libfltk in Ubuntu 16.04.
Build libfltk.
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Install deb files while installing depend package with running 'apt -f install'.
4 Install tigervncserver
tigervnc repository already has a devscripts files for Ubuntu 16.04.
This article will port it to Debian 8.
Download tigervnc from repository.
Checkout with hash which was used by this article.
Move devscripts files to the top of directory with symbolic link.
Convert package name which is different Ubuntu 16.04 from Debian 8.
Install packages for building tigervnc.
Make unused but failed patch to be empty.
Build tigervnc.
Install deb files while installing depend package with running 'apt -f install'.
5 Run VNC server
Create password with vncpasswd.
Run vncserver. Remote access port is 5900 + display nummber.
A port of below example is 5901.
Connect to vnc://<server>:5901 with remote vnc client.
Input password and connection will be completed as below.
6 Run XRDP server
Install and run xrdp.
Install Vnc Raspberry Pi
Connect to xrdp with rdesktop or 'Remote Desktop' on Windows.
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Input username and password, and connection will be completed.