10.0 Remote Management Troubleshooting Strategies

This section provides solutions to problems you might encounter when using the Novell® ZENworks® Linux Management Remote Management component:

Multiple Remote Login sessions to the same managed device fail

Severity: ZENworks Linux Management; Remote Management
Possible Cause: The limitation on the maximum number of Remote Sessions configured for XDMCP causes this.
Action: Configure the XDMCP settings on the managed device to allow more multiple Remote Sessions to the agent.

For example, if you want to configure XDMCP on GDM display manager:

  1. Run gdmsetup at the shell prompt.

  2. In Login Screen Setup window, Click XDMCP.

  3. Select the Maximum Remote Sessions option.

  4. Configure XDMCP for the number of remote sessions you want to use simultaneously.

The Remote Management session does not proceed if the managed device is displaying the GNOME logout dialog box

Severity: ZENworks Linux Management; Remote Management
Possible Cause: The GNOME session manager freezes all other processes on the logout dialog box by controlling the X Server.
Action: Start the Remote Management session after the user performs an operation in the dialog box on the managed device.

The Remote Management Viewer window fails to refresh after multiple Remote Management sessions from the same browser session

Severity: ZENworks Linux Management; Remote Management
Action: Clear the browser cache.

To clear the browser cache in the Firefox Web browser:

  1. In Tools menu of the Firefox browser, select Options.

  2. In the right pane, click Privacy.

  3. For Cache, click Clear.

  4. Restart the browser.

To clear the browser cache in the Internet Explorer Web browser:

  1. In the Tools menu of the Internet Explorer browser, select Internet Options.

  2. In the General page, click Delete Files in the Temporary Internet Files section.

  3. Restart the browser.

The Password dialog box loses focus during a Remote Management session

Severity: ZENworks Linux Management; Remote Management
Explanation: If you launch the ZENworks Control Center using Firefox and establish a Remote Management session, sometimes the focus is not on the password dialog box.
Possible Cause: Incompatibilities between the Java 1.4.x Focus Management and Remote Management Viewer causes the loss of focus of password dialog box.
Action: Click the title bar of the Remote Management Viewer window.

Unable to continue with the Remote Control operation because the Remote Management Viewer freezes

Severity: ZENworks Linux Management; Remote Management
Possible Cause: The current encoding that you have selected might not be able to handle numerous screen updates.
Action: In Remote Management Viewer window, select Hextile encoding in the Options tab and retry.

Authentication to the X Server fails

Severity: ZENworks Linux Management; Remote Management
Explanation: A Remote Control session to a Managed Device fails with an error message “host port is not an RFB Server”.
Possible Cause: The Remote Control Service has failed to authenticate to the X Server.
Action: Restart the Display Manager.

  1. Switch to any one of the text console.

  2. Change the runlevel of the managed device to 3 by entering the following command at the shell prompt:

    init 3

  3. Change the runlevel back to 5 by entering the following command at the shell prompt:

    init 5

Only a grey screen is displayed while performing a Remote Login session

Severity: ZENworks Linux Management; Remote Management
Explanation: If you select the Remote Login operation in the Remote Management dialog box, the launched session shows only a grey screen with an X cursor.
Possible Cause: XDMCP was not enabled on the managed device.
Action: Manually enable XDMCP by running /opt/novell/zenworks/bin/novell-rm-fixrl.sh with the required options.

If you use the -restartdm option, make sure that all applications are closed, then run the script from the text console.

For example, if you use the GDM display manager with the configuration file that is located at /etc/opt/gnome/gdm/gdm.conf, you can enable XDMCP using the following command:

#/opt/novell/zenworks/bin/novell-rm-fixrl.sh -dm gdm -cf /etc/opt/gnome/gdm/gdm.conf enable

Unable to perform a Remote Login session to a RHEL 5 managed device from a ZENworks Linux Management Server

Severity: ZENworks Linux Management; Remote Management
Action: Do the following at the shell prompt of the RHEL 5 managed device:

  1. Create a fonts directory by using the following command:

    mkdir -p /usr/X11R6/lib/X11/fonts

  2. Link the /usr/share/X11/fonts file to /usr/X11R6/lib/X11/fonts file by using the following command:

    ln -s /usr/share/X11/fonts /usr/X11R6/lib/X11/fonts

  3. Run gdmsetup.

  4. In the GDM Setup window, do the following:

    1. Click Remote.

    2. Select the Same as Local option from the pop-up menu.

    3. Click Security.

    4. Select the Allow Remote System Administrator Login option.

  5. Close the GDM Setup window.

  6. Reboot the managed device.