If you try to connect to the VNC server and end up with only a black screen, it's likely because there is no window manager for VNC. In the. On the server, VNC is supplied with the operating system in Red Hat and Oracle Enterprise Linux Starting VNC server: no displays configured [ OK ]. Why does vncserver fails with "Starting VNC server: no displays configured" on Red Hat Enterprise Linux? SPLASHTOP STREAMER VIRTUAL DISPLAY MAC
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Check the log messages to see any hint about the error. I hope that you would have set the password for the vnc enabled users separately. Re-verify the ports are whitelisted in firewalld and service is up. Comments 3. Could you please help me to find a solution? Newbie 10 points. Log in to join the conversation. SM Guru points. Sadashiva Murthy M.
Hello benoit monteil, Have you looked at the below solution articles? The VNC server can be configured to start a display for one or more users, provided that accounts for the users exist on the system, with optional parameters such as for display settings, network address and port, and security settings. For a single user it is not necessary to rename the file. For multiple users, a uniquely named service file for each user is required, for example, by adding the user name to the file name in some way.
See Section Leave the remaining lines of the file unmodified. To make the changes take effect immediately, issue the following command:. Set the password for the user or users defined in the configuration file. Note that you need to switch from root to USER first. The stored password is not encrypted; anyone who has access to the password file can find the plain-text password. Proceed to Section If you want to configure more than one user on the same machine, create different template-type service files, one for each user.
To start or enable the service, specify the display number directly in the command. With a valid display number, execute the following command:. You can also enable the service to start automatically at system start. Then, when you log in, vncserver is automatically started. As root , issue a command as follows:.
At this point, other users are able to use a VNC viewer program to connect to the VNC server using the display number and password defined. Provided a graphical desktop is installed, an instance of that desktop will be displayed. It will not be the same instance as that currently displayed on the target machine. After the setup, clients are able to access the GDM login window and log in to any system account. System default target unit should be graphical.
To get the currently set default target unit, use:. The -depth option specifies the pixel depth in bits of the VNC desktop to be created. Acceptable values are 8, 15, 16 and 24 - any other values are likely to cause unpredictable behavior of applications.
To ensure that the configuration changes take effect, reboot the machine. Alternatively, you can run the following. Change init levels to 3 and back to 5 to force gdm to reload. The command will launch a VNC session to the localhost where no password is asked.
You will see a GDM login screen, and you will be able to log in to any user account on the system with a valid user name and password. Then you can run the same test on remote connections. Configure firewall for the setup. Run the firewall configuration tool and add TCP port to allow incoming connections to the system.
Similarly to enabling the vncserver service, you can disable the automatic start of the service at system start:. Or, when your system is running, you can stop the service by issuing the following command as root :. By default a logged in user has a desktop provided by X Server on display 0. A user can share their desktop using the TigerVNC server x0vncserver. To share the desktop of a logged in user, using the x0vncserver , proceed as follows:.
Set the VNC password for the user:. Provided the firewall is configured to allow connections to port , the remote viewer can now connect to display 0 , and view the logged in users desktop. For operating the vncviewer , there is a pop-up menu containing entries which perform various actions such as switching in and out of full-screen mode or quitting the viewer. Alternatively, you can operate vncviewer through the terminal.
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