Symptoms
Users may find that when they connect to a desktop with an NVIDIA card configured, the desktop freezes and cannot see the mouse.When logging into the desktop, it looks okay during the logon process, but when the desktop, taskbar etc. is shown, the mouse disappears offscreen, and is almost impossible to move it into the session window. Resizing the desktop window (Change to windowed mode and back again to fullscreen) OR Without any operation, closing the desktop windows and re-connect fixes incidents of this.The issue does not happen: with a connection over PCOIP or when an NVIDIA card is not configured
In the Blast-Worker-SessionId*.log of the agent, there are log entries similar to the below:Location of Horizon View log files (1027744)
2023-08-23 14:01:44.570+0800 [WARN ] 0x0d10 bora::Warning: VNCSERVER-WIN32: Device access lost while acquiring the next frame, attempting to re-initialize...
2023-08-23 14:01:44.571+0800 [INFO ] 0x0d10 bora::Log: VNCSERVER-WIN32: Unable to duplicate the desktop ((0x80070005) : Access is denied.), LocalSystem: True Removed reason: (0x00000000) : The operation completed successfully. trying again...
2023-08-23 14:01:50.370+0800 [WARN ] 0x0d10 bora::Warning: VNCSERVER-WIN32: Topology has changed, mimicking failure
Resolution
Upgrade the NVIDIA driver if it is not the latest version A failure on Microsoft DD API has been confirmed and we are investigating jointly with Microsoft.Users may want to enable IDD which would avoid the problem faced when using Microsoft DD API.
The way to enable IDD is to set the registry as below and restart the agent:Reference: Horizon Agent Graphics Registry Settings (89193)This registry helps to enforce the “VMware Horizon Indirect Display Driver” for handling the Displays. Without the key, either IDD/SVGA may be used as a Display Driver in VDI. Blast:
Registry Path
HKEY_LOCAL_MACHINE\SOFTWARE\VMware, Inc.\VMware Blast\Config
Registry Name
PixelProviderForceViddCapture
Registry Type
REG_SZ
Registry Value
1
Related Information
This is a child article of Known Issues with NVIDIA VGPU and Horizon View (90271)
