Published Desktop Randomly Disconnects with Event ID 1 - ICA Client (Vanadium)

Published Desktop Randomly Disconnects with Event ID 1 - ICA Client (Vanadium)

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Article ID: CTX616908

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Updated On:

Description

Users running on thin clients using the maximum supported monitors for the device, each at at the maximum supported resolution, may be disconnect from the Published Desktop at random. At the time of the disconnect the endpoint device event log records: Event ID 1 from source ICA Client (Vanadium) with the message: "Incorrect Function" 
Following the steps detailed in: https://support.citrix.com/article/CTX259101/the-connected-session-is-suddenly-disconnected-by-ica-client-vanadium-error does not resolve the issue.

Environment

Caution! Using Registry Editor incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.

Resolution

Disable hardware decoding on the client side as the  .
create the following regkey on the client side:
HKLM\SOFTWARE\Wow6432Node\Citrix\ICA Client\Engine\Configuration\Advanced\Modules\GfxRender Under this create the following:

UseDirect3D (DWORD) set to 0
UseD3DHybrid (DWORD) set to 0
UseHwDecoding (DWORD) set to 0
 

Problem Cause

CDF Traces indicated that the disconnections were caused by graphics engine failures on the Endpoint Device. These failures occurred because of a lack of Graphical Memory resources on the client rendering device.

 

Additional Information

see also: https://support.citrix.com/article/CTX259101/the-connected-session-is-suddenly-disconnected-by-ica-client-vanadium-error

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