User Desktop Session Disconnects at startup

[tony roberts1709152250]

I have a windows 2008 R2 server which is now hosting XenApp 7.6 Fr3. When a user logs in and launches their published desktop or applications. When the desktop launches the session opens the desktop and at the point of the desktop being visible the session disconnects. Has anyone else had this problem if so can you help

 

thanks in advance.

[tony roberts1709152250]

HI just wanted to let you know I found the fix for the issue. 

 

In the Winlogon Regkey on the server there were two references to cmstart.exe. This caused two wfshell.exe to start for the user and when the second one started the connection disconnected. So i removed the second cmstart.exe and the users can now login fine. The only conclusion to this I can find is when I removed Xenapp 6.5 from the server the reg settings remained.

 

Thanks for all your suggestions and help.

[Daniel Weszligling]

could you check if your vda would loose the registration in studio if a user connect to it?

Have you checked the event logs of your vda, storefront and delivery controller?

[CarlStalhood]

Could be the mfaphook.dll issue. http://www.carlstalhood.com/virtual-delivery-agent-vda-7-6-2000-ltsr-cu2/#mfaphook

[tony roberts1709152250]

HI Carl thanks for the suggestion but unfortunately the mfaphook.dll has not worked. Daniel the server stays registered when the user connects.

[Daniel Weszligling]

Have you the same problem if someone connect via rdp to the machine?

[tony roberts1709152250]

No RDP is okay the only error I can see on the event logs for a user is some printer issues.

 

The print spooler failed to reopen an existing printer connection because it could not read the configuration information from the registry key S-1-5-21-1060284298-1078081533-1801674531-13534\Printers\Connections\Printer Name This can occur if the key name or values are malformed or missing.

 

this would make sense its a printer problem because its the last part to load in the profile.

[Daniel Weszligling]

Have any user this problem?

What you could try is to create a new user in your AD and give this one the permission to connect to your application or desktop but without any printer or mapped drive if this is possible.

[tony roberts1709152250]

I've tried two users but both still have the issue.

[Daniel Weszligling]

It is possible for you to create an test account which have only permissions to connect to your citrix application and desktop without mapped printers and network shares?

In the past I had a similar problem which was triggered from a printer which was mapped to the user but no longer exists. Citrix try to map the non existing printer and crashed on this try. After removing the printer anything works fine again.

[tony roberts1709152250]

I've tried a new user new profile etc but it still disconnects at startup.

[Daniel Weszligling]

Have you installed print drivers on your vda where you try to connect?

[Almon Packard1709159900]

On ‎11‎/‎4‎/‎2016 at 7:00 AM, tony roberts1709152250 said:

HI just wanted to let you know I found the fix for the issue. 

 

In the Winlogon Regkey on the server there were two references to cmstart.exe. This caused two wfshell.exe to start for the user and when the second one started the connection disconnected. So i removed the second cmstart.exe and the users can now login fine. The only conclusion to this I can find is when I removed Xenapp 6.5 from the server the reg settings remained.

 

Thanks for all your suggestions and help.

 

Thank you, this pointed me in the right direction. I experienced the same disconnects immediately after logon using VDA 7.15 cu4. I found two UserInit entries in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit. The original value causing the failure was "C:\Windows\system32\userinit.exe,C:\Windows\system32\KUsrInit.exe,". Removing the first entry corrected the problem. The correct value is shown below.

 

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"Userinit"="C:\Windows\system32\KUsrInit.exe,"