• Published Desktop session stuck at grey screen on session launch.
• You may see Citrix CTXUVI error events in Windows system Event logs with ID 1003/1005 on Citrix VDAs (CTXUVI Driver Injection failure).

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If you are using Trend Micro, please upgraded to v20 or Later.

Problem Cause

It is a security feature when CtxUvi.sys hooking driver detects any tampering with (meaning modification of) any of the Citrix Hook registry hives or Citrix Hook DLL files, it immediately disables all Citrix Hooking. In such a case, the symtoms could be published Desktop session stuck at grey screen on session launch.

Published desktop sessions can become stuck at a grey screen when the Citrix CTXUVI hooking driver detects modifications to Citrix hook files/registry entries or when antivirus software interferes with Citrix hooking components.