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Dell Wyse ThinOS Version 8.6 Administrator’s Guide

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Using Multi-monitors in VMware Blast session

This section is applicable to Wyse 5070 thin client. ThinOS supports multiple-monitor display to run virtual machines on each monitor.

Prerequisite: Update the VMware Blast package to the latest version. For more information, see the latest Dell Wyse ThinOS Release Notes.
User scenario:
  1. Connect multiple monitors to the ThinOS device.
  2. In the Display Setup dialog box, disable Mirror Mode, and configure the display layout.
  3. Launch a full screen VMware Horizon Blast session.
  • Display numbers—A virtual machine needs sufficient video memory to support multiple monitors. You can use up to four monitors with sufficient RAM.
    Table 1. Display Layout matrixDisplay matrix
    Resolution1920 x 10802560 x 1440
    No. of displaysTwo Three Four Five Six Two Three Four Five Six
    HorizontalYesYesYesNANAYes Yes Yes NA NA
    VerticalYesYesYesNANAYes Yes Yes NA NA
    GridYesYesYesNANAYes Yes Yes NA NA
  • 4K display—ThinOS supports four displays with 4K resolution in a Horizon blast session. Due to low performance, Dell recommends that you do not use four displays with 4K resolution.
    Table 2. 4K display support4K display support
    Hardware version Windows version Number of 4K displays supported
    10 (ESXi 5.5.x compatible) 7, 8, 8.x, and 10 1
    11 (ESXi 6.0 compatible) 7—3D rendering feature and Windows Aero are disabled. 3
    11 7—3D rendering feature is enabled. 1
    11 8, 8.x, and 10 1
  • 3D rendering—You can configure 3D graphics rendering for connected desktops. To use the 3D rendering feature, use up to two monitors with a resolution of up to 1920 x 1200. For a resolution of 4K (3840 x 2160), only one monitor is supported.
  • Blast H.264—The following table describes the performance of H.264 decoder in VMware Horizon sessions that use the VMware Blast display protocol:
    Table 3. Blast H.264 decodingBlast H.264 decoding
    Screen resolution within VMware Horizon Blast session Blast H.264 decoding in VMware Horizon Blast session Summary
    Session display width is less than or equal to 1920 pixels. Blast H.264 decoding is always enabled. Horizon client uses Blast H.264 decoding even if the H.264 decoder setting is disabled using GUI or INI options.
    Session display width is greater than 1920 pixels. Blast H.264 decoding is disabled by default. You can enable Blast H.264 decoding either on the ThinOS GUI or by deploying the INI parameter. By default, Horizon client does not use Blast H.264 decoding. If the Blast H.264 decoder setting is enabled on ThinOS, then the Horizon client uses H.264 decoding. Enabling H.264 may downgrade the session performance.

    For more information about the monitors and screen resolution, see the Monitors and Screen resolution section in the Horizon 7 Architecture Planning article at docs.vmware.com. However, Dell does not recommend that you use four displays with 4K resolution due to low performance.

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