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Modifying VNC Resolution

Last updated: 2022-03-25 15:56:04


    This document introduces how to adjust the resolution of the instance login via VNC through the CVM console.

    If Windows system images have very low VNC resolutions, some applications may fail to be properly displayed or opened. To avoid these issues, you need to modify the resolutions of Windows system images.
    Some Linux system images have lower VNC display resolutions by default. For example, the VNC resolution for CentOS is only 720 * 400. You can set the VNC resolution to 1024 * 768 by modifying the parameter grub.


    More recent Linux images such as CentOS 7, CentOS 8, Ubuntu, and Debian 9.0 adopt a default VNC resolution of 1024 * 768, which can be used without any modifications.


    You have logged in to the instance via VNC. For details, see the following documents:



    The steps below describe how to modify the VNC resolution of a Windows instance on the Windows Server 2012 operating system.

    1. Right-click on the desktop and select Screen resolution, as shown below:
    2. In the “Screen Resolution” window, set Resolution to your desired value and click Apply, as shown below:
    3. In the pop-up window, click Keep changes.
    4. Click OK to close the “Screen Resolution” window.


    The VGA parameter values corresponding to different Linux instance resolutions are listed below:

    Resolution640 * 480800 * 6001024 * 768
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