Problems with VNC connection black screen

This article describes how to solve the problem of vnc black screen.

I installed the operating system of red flag. Black screen after connecting Vnccserver

• Check that the system has VNC installed

#rpm-Q VNC

• Solutions:

1. Modify the configuration file/root/.vnc/xstartup

Note: Some system configuration has –nolisten TCP and –NOHTTPD, these two are blocked Xwindows Landing and HTTP mode VNC landing, if you need a graphical interface, then delete this part

If you are using the GNOME image interface, you need to comment out the following two lines,
#xterm-geometry 80x24+10+10-ls-title "$VNCDESKTOP Desktop" &
#twm &
and add the following line:
Gnome-session &

For example, my configuration file is as follows
#!/bin/sh
# Uncomment the following-lines for normal desktop:
Unset Session_manager
Exec/etc/x11/xinit/xinitrc
[-x/etc/vnc/xstartup]&& Exec/etc/vnc/xstartup
[-R $HOME/. Xresources] && Xrdb $HOME/. Xresources
Xsetroot-solid Grey
Vncconfig-iconic &
#xterm-geometry 80x24+10+10-ls-title "$VNCDESKTOP Desktop" &

#gnome-session & #set Starting GNOME desktop
startkde& #kde Desktop

#twm & #Textinterface

Note: This part is the part that is modified or added



2. Modify User profile:/etc/sysconfig/vncservers


Open config file: vi/etc/sysconfig/vncservers, remove the "#" from the following two lines, which means to remove the comments from the two lines.
Vncservers= "1:root"
vncserverargs[1]= "-geometry 800x600"

1 means that VNC runs on desktop 1, so you can start the root desktop. You can add other users, such as vncservers= "

1:root,2:user1,3:user2 ", of course these users are implementing the system exists.

For example: My/etc/sysconfig/vncservers configuration file is as follows:

Vncservers= "1:root"
#VNCSERVERARGS [1]= "-geometry 800x600"

vncserverargs[1]= "-geometry 800x600-alwaysshared-depth 24″-alwaysshared representative allows multiple users to log in at the same time-depth on behalf of the color depth, parameters have 8,16,24,32. 

Note: This part is the part that is modified or added

In addition: if there is an image interface, the system settings > Server Settings > Services in the Vncserver tick, you can start with the system.

3, change the authority of Xstartup

This is a problem that many people tend to overlook, and is one of the reasons why a black screen is created after a successful connection.

In CentOS, the file path for Xstartup is:/root/.vnc/(can be locatexstartup to view Xstartup file path)

So need to execute: chmod 777 Root/.vnc/xstartup

4. Turn off firewall restrictions on VNC ports

If you need to control a Linux network from the extranet, you need to open the appropriate port for the firewall and port mapping on the router.
The VNC port to the browser is 5800+n, and the port to Vncviewer is 5900+n,n is the display number that is set.

If you do not want to open the firewall, but still need the VNC service, you will need:

Edit Vi/etc/sysconfig/iptables
Add the following two lines to the inside:
-A rh-firewall-1-input-m state--state new-m tcp-p TCP--dport5901-j ACCEPT
-A rh-firewall-1-input-m state--state new-m tcp-p TCP--dport5902-j ACCEPT

What is needed here is that the corresponding port of display N is 5900+n, so it is not recommended to set too much.

5. Start the VNC Server:

Open Terminal execution: Vncserver
The first time you run Vncserver, you will be asked to enter the password two times, you will see the following message:
New ' Localhost.localdomain:1 (root) ' Desktop Islocalhost.localdomain:1
Starting applications specified In/root/.vnc/xstartup
Log file Is/root/.vnc/localhost.localdomain:1.log
The ": 1" in the top message indicates the first VNC desktop to start.

--

1. VNC Start/stop/restart #service vncserver Start/stop/restart close the specific vncserver command:vncserver-kill:1 Vncserver-kill:22. Set Password #vncpasswd

6. Stop vncserver: (Selected readings)

The way to stop Vncserver is to execute: vncserver-kill:1
Note: ": 1", means stop the first VNC desktop, 1 represents the currently enabled Vncserver sequence number, ": 1" before there is a space. If the sequence number that is currently started is 2, you should use "Vncserver-kill:2" if you want to turn it off.

7. Modify the VNC password: (Selected readings)

The way to modify the VNC password is to execute: vncpasswd

Enter the password two times.

8: Check whether the server-side VNC server is functioning correctly :

Execution: Ps-ef|grep VNC

If VNC is executing, you can see a similar message:

[[email protected] ~]# Ps-ef|grep VNC
Root 3605 1 0 Jul13? 00:13:51 xvnc:1-desktopmyims.local: 1 (Root)-httpd/usr/share/vnc/classes-auth/root/. Xauthority-geometry 800x600-depth 16-rfbwait 30000-rfbauth/root/.vnc/passwd-rfbport 5901-PN

The description is the serial number ": 1" the VNC process listens on port 5901.

9.VNC Client

Once the server is functioning properly, we can consider using a VNC client to connect to it.

Configuration of the Windows client VNC Viewer:
1. Download VNC free Edition for Windows Version 4.1.2 from http://www.realvnc.com/download.html
2. Open Vncviewer:
Fill in Vncserver IP: Number (1 or 2 or ...)
3. Vncviewer Toggle Full Screen mode: F8

10. Configuration Files :

/etc/x11/xorg.conf Setting the screen resolution

Here, your VNC should already be able to connect, but there may be a problem with the black screen:

1, check the log log under/root/.vnc/, there is no error, there may be insufficient xstartup permissions. "Chmod xstartup777" under Change

permissions, reboot and then forward.

2, restart the computer, try. I am the various configurations, always black screen, restart the computer after OK.

Workaround reference: http://blog.csdn.net/lifuxin1125/article/details/7744027

Problems with VNC connection black screen

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