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FusionAccess Desktop Solution V100R006C20 Application Virtualization User Guide 08 (FusionSphere V100R006C10 or Earlier)

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
VNC Login Troubleshooting

VNC Login Troubleshooting

Java Plug-in Faults

After the Java (TM) plug-in is added, configure the plug-in by following steps provided in Requirements on Java Plug-in Installation in the FusionSphere V100R006C20 Product Documentation (Server Virtualization).

Fault 1: The system displays "This function requires the Java (TM) plug-in. Please download and install the Java plug-in."

Solution: Download the corresponding version of the Java plug-in as instructed.

Fault 2: The system displays "The version of the Java (TM) plug-in you have installed is earlier than 1.8.0_131. Please download and install a later version to support this function."

Solution: Download the corresponding version of the Java plug-in as instructed. If the Virtual Network Computing (VNC) login fails again after the Java plug-in is installed, uninstall all the Java plug-ins and reinstall them.

Fault 3: A message is displayed indicating that the Java (TM) plug-in expired or is not safe.

Solution:
  • Click Run and log in to a VM using VNC. The information will be displayed again upon next login.
  • Download and install the Java plug-in of the latest version.

Fault 4: The system displays "Your Java version is insecure."

Solution:
  • (Recommended) Do not update the Java plug-in.

    Click Later and select Do not ask again until the next update is available.

  • Update the Java plug-in.

    Click Update and download and install the latest Java plug-in as prompted. After the installation, restart the browser and log in the system using VNC.

    If Update is clicked, VNC is available only after the new Java plug-in is installed.

Login Faults

Fault 1: After Log In Using VNC is clicked, a dialog box is blocked.

Solution:

  • Disable the pop-up blocker of the browser.
  • Configure the pop-up blocker settings to always see pop-ups for the site.

Fault 2: If "The web site certificate cannot be validated. Do you want to continue?" is displayed, the VM login using VNC fails after No is clicked.

Solution:
  1. Deregister the current user.
  2. Close all the pages of the browser.
  3. Log in to the FusionCompute again.
  4. Click Log In Using VNC.
  5. Click Always trust the issuer's content.
  6. Click Yes.

Fault 3: The system displays "The VM attached with a GPU cannot be logged in to using VNC after the GPU works. Detach the GPU from the VM and try again or log in to the VM by running mstsc."

Solution:
  • Detach the GPU from the VM, close the VNC login page, and log in to the VM using VNC again.
  • Log in the VM in remote mode.

Fault 4: The VNC login is unavailable after the FusionCompute is upgraded or rolled back after upgrade.

Solution:
  1. In the Java installation directory (for example, C:\Program Files\Java\jre7\bin), double-click javacpl.exe to open the Java Control Panel window.
  2. Click Settings to open the Temporary Files Settings window.
  3. Deselect Keep temporary files on my computer.
  4. Click Delete Files, select all the files in the displayed dialog box, and click OK.

Fault 5: During the VNC login, a message is displayed indicating that the Java security settings have blocked an application from running.

Solution:
  1. In the Java installation directory (for example, C:\Program Files\Java\jre7\bin), double-click javacpl.exe to open the Java Control Panel window.
  2. On the Security page, To lower the security level, you can add the application programs that are allowed by security level Medium in earlier versions to Exception Site List one by one. Therefore, a Java version later than Java 8 Update 20 reduces the risks caused by a lower security level.

Fault 6: During VNC login, a dialog box is displayed asking you to enter the password.

Solution:
  1. In the Java installation directory (for example, C:\Program Files\Java\jre7\bin), double-click javacpl.exe to open the Java Control Panel window.
  2. Click Settings to open the Temporary Files Settings window.
  3. Deselect Keep temporary files on my computer.
  4. Click Delete Files, select all the files in the displayed dialog box, and click OK.

New VNC Login Faults

Fault 1: During login using new VNC, a page is displayed indicating that login failed.

Solution:
  1. Log in to the VRM using PuTTY, run the following command to restart the new VNC service:

    service vncd restart

  2. Clear up browser cache files, reset the browser, and use new VNC to log in to the VM again.

CD/DVD-ROM Drive or ISO File Mounting Faults

Fault 1: After logging in to a VM using VNC and mounting a CD/DVD-ROM drive or ISO file to the VM, the user cannot install the Linux operating system (OS).

Solution: Click , and restart the VM as instructed.

Fault 2: During CD/DVD-ROM drive or ISO file mounting, the CD/DVD-ROM drive or ISO file is disconnected.

Solution: Mount the CD/DVD-ROM drive or ISO file again. The following operations cause CD/DVD-ROM drive or ISO file disconnection during mounting:
  • The VNC login page is closed.
  • The VNC login page is refreshed.
  • Log in to the same VM using VNC for multiple times.

Fault 3: After a CD/DVD-ROM drive is successfully mounted, an exception occurs if you view the CD/DVD-ROM drive file.

Solution:
  1. In the Java installation directory (for example, C:\Program Files\Java\jre7\bin), double-click javacpl.exe to open the Java Control Panel window.
  2. Click Settings to open the Temporary Files Settings window.
  3. Deselect Keep temporary files on my computer.
  4. Click Delete Files, select all the files in the displayed dialog box, and click OK.
  5. Clear the browser cache, restart the browser, mount the CD/DVD-ROM drive again, and check whether the CD/DVD-ROM drive works properly.
    • If yes, no further action is required.
    • If no, go to 6.
  6. Log in to the host accommodating the VM, run the service rcdromsvc restart command to restart the CD/DVD-ROM drive, and mount the CD/DVD-ROM drive again:

    service rcdromsvc restart

Input Delay

Fault 1: When a user inputs information using a keyboard, the VNC window responds slowly.

Possible Causes:
  • The network delay is high.
  • The CPU or memory usage on the local PC is high.
  • The Java plug-in cache is high.
  • The host load is high due to excessive VM VNC logins.

Solution: Typically, the VNC window responds to user inputs within 0.3 second. If the VNC window takes more than 0.3 second to respond, check the system based on the preceding possible causes, and troubleshoot the system.

VNC Keyboard Settings

Keyboard type: Logging in to a VM using VNC involves four types of keyboards, as shown in Table A-5.

Table A-5 Keyboard type

Keyboard Type

Description

Language Setting

Physical keyboard

Used by terminals for information input.

Selected by users locally.

Input method keyboard on the terminal

Used to log in to terminals, such as a PC, on the management console. The keyboard input method must comply with the physical keyboard language type. In this way, the entered data can be correctly transferred from the physical keyboard to the VNC client.

Selected by users locally.

VNC keyboard

Used for VNC logins. The VNC keyboard input method must comply with the physical keyboard language type. In this way, the entered data can be correctly transferred from the VNC client to the VM OS.

NOTE:

The English keyboard is used by default.

Configured on FusionCompute.

Hungarian is not supported.

VM OS keyboard

Used for configurations in VM OSs. You must ensure that the keyboard input method complies with the physical keyboard language type. In this way, the entered data transferred from the VNC client can be correctly responded.

Configured during the OS installation process or configured by users locally.

Keyboard setting description
  1. The entered data is as expected only if the input method keyboard on the terminal, the VNC keyboard, and the VM OS keyboard languages are the same as the physical keyboard language.
  2. When you log in to a VM using VNC, after the keyboard language is changed, the keyboard setting takes effect only if the VM VNC login page is closed and then opened again.
  3. When you use the soft keyboard to enter data on the terminal, the functions and restrictions are the same as those of the physical keyboard. In addition, the soft keyboard cannot be together used with the physical keyboard.

Configuration example

Scenarios: You must change the languages of the other three types of keyboards to the same as that of the physical keyboard for expected data entering. For details, see Table A-6.

Table A-6 Combination solutions for the languages of four keyboards

Combination Solution

Physical Keyboard

Input Method Keyboard on the Terminal

VNC Keyboard

VM OS Keyboard

Solution 1

English

English

English

English

Solution 2

French

French

French

French

Procedure (English is used as an example.)
  1. Locally configure the language to English (US) in the input method keyboard on the terminal.
  2. Log in to FusionCompute. In the navigation tree on the left, choose the VM, click Options, switch to the VNC Keyboard Settings tab, and set Keyboard to English (US).
  3. Log in to the VM and change the VM OS language to English (US).
  4. Use the English keyboard.

    After the preceding operations are performed, the languages of the four types of keyboards have been the same. The entered letter can be as expected.

Other Faults

Fault 1: The keyboard does not function in a VM.

Solution: Click Alt or Ctrl on the VNC toolbar to unlock the keyboard.

Fault 2: The browser does not respond if the user clicks Log In Using VNC.

Solution: If you have logged in to the VM using VNC, the login page is not displayed after you click Log In Using VNC. Therefore, check whether the login page has been opened already.

Fault 3: If multiple VNC windows are concurrently opened, the VNC windows may repeatedly pop up when users are performing other operations, adversely affecting users' operations.

Solution:
  1. In the Java installation directory (for example, C:\Program Files\Java\jre7\bin), double-click javacpl.exe to open the Java Control Panel window.
  2. Click View on the Java tab, add parameter -Xms128M -Xmx256M -Xverify:none to Runtime Parameters, click OK, and restart the browser.

Fault 4: Due to a driver error, the mouse cursor cannot be displayed in the VM that binds to certain GPUs, such as NVIDIA GRID K1 and NVIDIA GRID K2, after the GPU driver is installed on the VM.

Solution:
  • For the VNC of early versions: Log in to the VM using the VNC and click in the VNC window.
  • For the VNC of the latest version: Log in to the VM using the VNC and press Ctrl+Alt+Shift. In the configuration window that is displayed, select Display local PC mouse cursor. Then, press Ctrl+Alt+Shift again to hide the configuration window.

Fault 5: The following error message is displayed during the VNC login: You do not have permission to access this connection. If you require access, please ask your system administrator to add you the list of allowed users, or check your system settings.

Solution:
  1. Open Internet Explorer. Choose Tools > Internet Options.
  2. Click the General tab and click Settings in the Browsing history area.

    The Temporary Internet Files and History Settings dialog box is displayed.

  3. Select Every time I visit the webpage for Check for newer versions of stored pages.
  4. Click OK.

    The Temporary Internet Files and History Settings dialog box is closed.

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Updated: 2019-04-25

Document ID: EDOC1000182383

Views: 13075

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