When users connect to their Published desktop from a Desktop Lock enabled Thin Client, lock their client and unlock the client, the application Windows within the session appear behind the task bar. The only way to resolve the problem is to logout from the session and log back in again. Problem is not seen when the same sequence is tried from a fat client / full desktop client.

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Setting the following registry key will make sure that the ICA session is not disconnected when the client is locked there by preventing the problem.

On 32-bit Windows:

HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\Dazzle
Name: LiveInDesktopDisconnectonLock
Type: REG_SZ
Value: False

On 64-bit Windows:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\Dazzle
Name: LiveInDesktopDisconnectonLock
Type: REG_SZ
Value: False

 

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Problem Cause

When desktop lock is enabled, locking the client disconnects the ICA session. During the unlock the session is reconnected and the window position calculation seems to have gone wrong.