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ERROR - Black screen in CFX-Pre and CFD-Post
Authored by Caleb Scharf
June 22nd, 2021
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KB956427
Error
The user experiences a black screen CFX-Pre and CFD-Post when working over Windows remote desktop.
Description/Cause
There is an issue in CFX-Pre and CFD-Post in Ansys 2019 R1 and 2019 R2 when connecting a PC or Virtual Machine remotely with Windows Remote Desktop. Note: there have been no reported similar issues for any earlier releases.
Related Ansys KB Article - https://support.ansys.com/AnsysCustomerPortal/en_us/Knowledge+Resources/Solutions/CFX/2061743
Solution
There are two potential solutions to this problem. The first is the easiest to implement.
Solution #1 - Environmental Variable
Set the following environment variable on the computer you are remoting into. This solution doesn't work in all situations.QT_OPENGL=desktop
Solution #2 - Utilize nVIDIA's OpenGL RDP
Obtain and run "nvidiaopenglrdp.exe" application provided by Nvidia on the computer you are remoting into. You will still use the same Windows RDP client, but this utilize enables OpenGL support over RDP which can improve performance and in this case, solves a problem. You must register in order to download this application.- Download the application from - https://developer.nvidia.com/nvidia-opengl-rdp
- SimuTech Employees can access this file here:
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