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Dell Wyse ThinOS Version 8.6 Administrator’s Guide

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RDP H.264

From ThinOS version 8.5.1, logs of H.264 and H.264-AVC444 are hidden and not displayed in the Event Log tab. In ThinOS version 8.6, the H.264 resolution limitation is changed for different platforms.

The following table describes the RDP H.264 functionality matrix:

Table 1. RDP H.264 functionality matrixRDP H.264 functionality matrix
RDP H.264 Session connection Support platforms
H.264 is not enabled. Windows 7/ Windows Server 2008 R2 All ThinOS-based platforms
H.264 is automatically disabled for display resolutions higher than 1920 x 1200. Windows 8.x/ Windows Server 2012 R2, Windows 10/Windows Server 2016 Wyse 3040 thin client
H.264 is automatically disabled for display resolutions higher than 2048 x 1200. Windows 8.x/ Windows Server 2012 R2, Windows 10/Windows Server 2016 Wyse 5060 thin client, Wyse 5470 thin client, and Wyse 5470 All-in-One thin client
H.264 is automatically disabled for display resolutions higher than 2048 x 1280. Windows 8.x/ Windows Server 2012 R2 Wyse 5010 thin client, Wyse 5040 thin client, Wyse 7010 thin client, Wyse 5070 thin client
H.264 is automatically disabled for display resolutions higher than 3840 x 2160. Windows 10/Windows Server 2016 Wyse 5010 thin client, Wyse 5040 thin client, Wyse 7010 thin client, Wyse 5070 thin client, Wyse 5470 thin client, and Wyse 5470 All-in-One thin client

The following table describes the RDP H.264 decoding matrix for Wyse 5070 thin client:

Table 2. RDP H.264 decoding matrixRDP H.264 decoding matrix
Unit type GPU Session Windows 10/Windows Server 2016 Windows 8.1/Windows Server 2012 R2
Display resolution H.264-AVC444 Decoding H.264 Decoding
Wyse 5070 Extended thin client AMD 3840 x 2160 Enabled Software Disabled
2560 x 1440 Enabled Software Disabled
2048 x 1280 Enabled Software Enabled Hardware
1920 x 1200 Enabled Software Enabled Hardware
Intel 3840 x 2160 Enabled Software Disabled
2560 x 1440 Enabled Software Disabled
2048 x 1280 Enabled Software Enabled Hardware
1920 x 1200 Enabled Software Enabled Hardware
Wyse 5070 thin client—Celeron processor

Wyse 5070 thin client—Pentium processor

Intel 3840 x 2160 Enabled Software Disabled
2560 x 1440 Enabled Software Disabled
2048 x 1280 Enabled Software Enabled Hardware
1920 x 1200 Enabled Software Enabled Hardware

All data described in the table is based on virtual machine without RemoteFX/vGPU enabled configuration.

NOTE:
  • Windows 10/Window Server 2016 must be hosted in Microsoft RDS 2016 broker for enabling H.264-AVC444.
  • H.264 logs and H.264-AVC444 logs are hidden and not displayed in the Event Log tab.

Known issues

  • In Mirror mode with active session, when you change the resolution from 2048 x 1280 to greater than 2048 x 1280, the connected RDP session (Windows 8/ Windows 2012 R2) is closed forcibly and an error message—RDP: The server-side graphics subsystem is in an error state and unable to continue graphics encoding is displayed. This is because the session is not reconnected in Mirror mode after resolution is changed that resulted in H.264 codec exceeding its supported resolution.

    Workaround—You must manually reconnect the session after the resolution is changed.

  • In an RDP session with VOR enabled by default (Windows 8.1 x86), you connect to a session with full screen, and span more than four 4K monitors. In this scenario, if you play a video, the session may be disconnected automatically with an error log RDP: The server-side graphics subsystem is in an error state and unable to continue graphics encoding. This is because VOR /x-264 requires more resources, such as RAM, than the server resources.

    Workaround—You can reduce the number of monitors or lower the resolutions or switch to other 64-bit operating system with more RAM.

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