Black screen on VNC viewer(Unable to contact setting server)

 A black screen on a VNC viewer, accompanied by an "Unable to contact setting server" error message, can occur for various reasons. This issue is typically associated with problems related to the VNC server or server settings. Here are steps to troubleshoot and resolve the issue:


1. **Check VNC Server Status**:

   Ensure that the VNC server is running and active on the remote host. You should be able to connect to the VNC server on the remote machine. Check the VNC server's status and restart it if necessary.


2. **Firewall Configuration**:

   Firewalls on the remote machine or network might be blocking VNC connections. Make sure that your firewall settings allow VNC traffic. Configure your firewall to permit VNC connections on the appropriate port (default is 5900). Check if there are any firewall rules that are preventing the VNC server from communicating.


3. **VNC Server Configuration**:

   Review the VNC server's configuration settings. Ensure that it's configured to accept incoming connections and that the settings, such as display number and authentication, are correctly configured.


4. **Authentication and Password**:

   Verify that you are providing the correct authentication credentials (password or key) when connecting. Ensure that you are using the correct authentication method that the VNC server is expecting.


5. **Display Number**:

   Confirm that you are connecting to the correct display number. The default VNC display number is usually ":0" for the first display. If you're connecting to a different display, specify it in the format ":1," ":2," and so on.


6. **Virtual Display (Xvnc)**:

   If you are using a virtual X server such as Xvnc, ensure that it is configured and running properly. Check the Xvnc settings to confirm that it's set up correctly.


7. **Check VNC Server Logs**:

   Review the logs for the VNC server. These logs may provide information about any issues or errors that are occurring. Look for any error messages or warnings that can help diagnose the problem.


8. **Network Connectivity**:

   Ensure that there are no network connectivity issues between your local machine and the remote VNC server. Check for network problems, including issues with routing and DNS.


9. **VNC Viewer Configuration**:

   Check your VNC viewer settings. Make sure that you are specifying the correct IP address or hostname for the remote machine, along with the correct port number.


10. **VNC Server Software**:

    If you're still having issues, consider trying a different VNC server software on the remote machine or a different VNC viewer on your local machine to see if the problem persists.


If you've gone through these steps and are still encountering the "Unable to contact setting server" error along with a black screen on your VNC viewer, consider providing more specific details about your VNC server software and your network environment for further assistance.

Comments

Post a Comment

Popular posts from this blog

bad character U+002D '-' in my helm template

 In Helm templates, the hyphen character (`-`) can sometimes be treated as a reserved character, particularly when defining values or labels. To include a hyphen character in a Helm template without issues, you can use one of the following approaches: 1. **Quoting the Hyphen:**    You can enclose the hyphen in double quotes, like this:    ```yaml    key: "-"    ```    This way, Helm will interpret the hyphen as a string rather than an operator. 2. **Using Backticks:**    If you need to use the hyphen within a Go template function or inside backticks, you can escape it with a backslash (`\`), like this:    ```yaml    value: `{{ .Values.someField | printf "%s \\-" }}`    ```    The backslash prevents Helm from interpreting the hyphen as a special character. 3. **Variable Assignment:**    Assign the value to a variable and use it. For example:    ```yaml    {{- $hyphen := "-" }}    key: {{ $hyphen }}    ```    This way, you can use the variable `$hyphen` wher
Read more

GitLab pipeline stopped working with invalid yaml error

 When your GitLab pipeline has stopped working with an "invalid YAML" error, it means there's a problem with your `.gitlab-ci.yml` file. This could be due to syntax errors, incorrect indentation, or other issues in your pipeline configuration. Here's how to troubleshoot and resolve this issue: 1. **Check for Syntax Errors**:    Carefully review your `.gitlab-ci.yml` file for any syntax errors. Common issues include missing colons, indentation problems, or mismatched quotation marks. Use a YAML linter or an online YAML validator to identify and correct syntax errors. 2. **Indentation**:    YAML relies heavily on proper indentation. Make sure that all lines within the same block have consistent indentation (typically using spaces, not tabs). Incorrect indentation can cause YAML parsing errors. 3. **Dashes and Lists**:    Ensure that you use the correct syntax for lists (arrays) in YAML by starting each item with a dash (`-`). Be consistent with your use of dashes throug
Read more

How do I add a printer in OpenSUSE which is being shared by a CUPS print server?

 To add a printer in openSUSE that is being shared by a CUPS print server, you can use the following steps: 1. **Ensure CUPS Client is Installed:**    Make sure your openSUSE system has the CUPS client tools installed. You can install them using the following command:    ```bash    sudo zypper install cups-client    ``` 2. **Discover Available Printers:**    Use the `lpinfo` command to discover available printers on your CUPS print server. Replace `cups-server-hostname` with the hostname or IP address of your CUPS server:    ```bash    lpinfo -v -h cups-server-hostname:631    ```    This command should list the printers shared by the CUPS server. 3. **Add a Printer:**    Use the `lpadmin` command to add a printer. Replace `printer-name` with the name of the printer you want to add and `printer-uri` with the URI obtained from the `lpinfo` command:    ```bash    sudo lpadmin -p printer-name -E -v printer-uri    ```    For example:    ```bash    sudo lpadmin -p MyPrinter -E -v socket://cu
Read more