LogonUI.exe - Sessions Disconnected

[Oliver Knights1709159340]

Hello,

 

We are seeing users that are disconnected with 5 processes. When we kill the Windows (Logon User Interface Host) process the sessions will log off. Does anyone know how to resolve this? Users keep getting locked out because they have hung sessions, sometimes multiple sessions on the same server.

 

We are running V7.14

 

[Joeri Vermeiren]

I'm currently having this issue as well and found the following article describing the exact same problem:

https://support.citrix.com/article/CTX232490

 

I'll be changing the regkey tomorrow and will verify if this resolves the issue.

[Thomas Deutschmann]

On 10/18/2018 at 3:11 PM, Joeri Vermeiren said:

I'm currently having this issue as well and found the following article describing the exact same problem:

https://support.citrix.com/article/CTX232490

 

I'll be changing the regkey tomorrow and will verify if this resolves the issue.

Hi, did you try this, and has it helped?

"If the regkey HKLM\Software\Citrix\Citrix Virtual Desktop Agent "DisableLogonUISuppression is set to "1" the issue does not occur."

[Salim Hurjuk]

Did anyone applied this Key and checked?

[Tim Scott1709157919]

On ‎9‎/‎27‎/‎2018 at 7:39 AM, Timothy Wood1709158062 said:

@Tim Scott1709157919 did you get any feedback from Citrix on this?  I have the same issue with Server 2016 and 7.15 LTSR CU2 right now.  If I end the logonui.exe they will log off.  I already have a policy to log off disconnected sessions after 1 minute but even that isn't working.  

 

We were not able to consistently reproduce the issue in our environment at the time and other things took priority over this, it fell flat and we never moved forward on it. We are currently rolling out 1912 LTSR which will hopefully negate the issue though Citrix doesn't seem to have done anything to update the article referenced above. It mentions that Microsoft will path the problem but no specifics around that leaving us to assume it is fixed.

[Jay Ilagan1709154631]

You have to place LogonUI.exe on SYSPROCS for TerminalServer key in the registry. Along with csrss.exe, winlogon.exe.

[Casey Gray]

On 4/3/2020 at 9:25 AM, Jay Ilagan1709154631 said:

You have to place LogonUI.exe on SYSPROCS for TerminalServer key in the registry. Along with csrss.exe, winlogon.exe.

 

You add them to run under the system context?

 

HKLM\SYSTEM\ControlSet001\Control\Terminal Server\SysProcs\ -Name "LogonUI.exe" -Type DWORD -Value "0"

[Barbara CERRETTI]

Same here, we can reproduce the issue with Windows Server 2019 and 2016 with VDA 1912 LTSR.

We have open a ticket with Citrix but still no solution yet. Someone have some news?

[Adam Bowers]

On 6/8/2020 at 9:43 AM, Barbara CERRETTI said:

Same here, we can reproduce the issue with Windows Server 2019 and 2016 with VDA 1912 LTSR.

We have open a ticket with Citrix but still no solution yet. Someone have some news?

 

I am experiencing the same issues with 2019 and 1912 LTSR, did you get a fix back from Citrix Support? Thanks

[Aaron Ott]

Same question, any info from Citrix? I have all kinds of issues including this one, ghost sessions where the only process left is csrss.exe and it can't be killed - reboot needed to fix that one. And also similar issues to @michael miller1709159154, and for those we end up having to log those users out via Director or Studio. Not sure the wait time lines up, I tried to repro and couldn't get it to work. It's random and doesn't affect all users.

[Candi Franck]

I've had a ticket open for the same for a month now. Curious if anyone tried this suggestion:  

Quote

 

On 4/3/2020 at 4:25 AM, jilagan867 said:

You have to place LogonUI.exe on SYSPROCS for TerminalServer key in the registry. Along with csrss.exe, winlogon.exe.

 

 

The article they just told me to try today was this one: https://support.citrix.com/article/CTX263581, but I already had the group policy keys... so not hopeful about adding the reconnect value. 

[Jiad Elkadri]

Did anybody ever get a resolution to this issue. We're experiencing the same issues.

 

Thanks

[Romain Bodeloche]

hello,

same problem with Windows Server 2019 VDA 2109 up to date

does anyone have a solution?

[Kai Duumlster]

Hello, 

 

I have the same issue with VDA 2109.

Will rollback to VDA2106.

 

I use FSLogix and Crowdstrike on my Citrix Farm.

 

Kai

[Fabian Dutrieux1709161165]

Hello,

We have the same issues and together with Citrix troubleshooting over 3 weeks now. Today there where no new cases. The only thing that is different is that there where less concurrent user on the catalog/delevery group. It looks like somewhere around 260 concurrent users things starting to go wrong. We are using Citrix Virtual Apps Essentials on Azure with 3 cloud connectors. I've did some investigation on:

• Cloud Connectors
• Microsoft licensing server
• FSLogix
• WIndows server 2019 (VDA2109). Issue also occurs on the VDA 2106 and Windows server 2016.

All systems have enough resources and  there is no latency or network issues.

[Koen Moulijn]

Hi,

We also have the same issues. We have tried almost all solutions found on forums but still no luck. Is there any known fix at this moment?

[Philippe Marro1709155269]

We had the issue with Citrix 1912 LTSR CU4 downgraded to CU3 with VDA Cleanup Utility and does not happen anymore. Maybe someone can confirm this...

[Koen Moulijn]

We are currently running Citrix 2109. We just installed the Citrix 2112 and are going to see if we still have this issue. 

 

We will try the Citrix 1912 LTSR CU3 if the issue still occurs.

[Benjamin Kruumlger]

1 hour ago, Koen Moulijn said:

We are currently running Citrix 2109. We just installed the Citrix 2112 and are going to see if we still have this issue. 

 

We will try the Citrix 1912 LTSR CU3 if the issue still occurs.

Please share your experiences immediately. We also have Citrix 2109.

Thanks very much!

[Koen Moulijn]

Unfortunately, updating Citrix to 2112 didn't solve the problem.

We also found a post stating the following: "You have to place LogonUI.exe on SYSPROCS for TerminalServer key in the registry. Along with csrss.exe, winlogon.exe.". This also didn't do the trick.

[Ken Bjelka]

Same here, upgraded to 1912.0.4000.4227 (CU4) and we have seen the same issue; Users are reporting being stuck at preparing windows on login. Turns out they are trying to reconnect to a stuck disconnected session. When you kill the Windows Logon User Interface Host process on the disconnected session the user can login to the farm. This was not seen prior to introducing 1912.0.4000.4227 (CU4). Escalating to Citrix tomorrow.

[Jens Strohschnitter1709152492]

Same here ... 19.12CU4, 2109, 2112 all the same issue. Eventlog showes RPM ID12 

Connection broken unexpectedly for user XXXX\xxxx, session X

 

Going back to 19.12CU3, anything works.

 

Did someone ever heard from Citrix ?

[Matt Grojean1709162436]

Joining in to say this happens with me as well on Windows 10 multisession and VDA2109 or 2112. Doesn't occur on 2106. Opened a ticket with Citrix today.

 

[Stefano Losego]

Hi everyone,

 

we've had a very similar issue, with 'LogonUI.exe' process hunging but in the logon phase, for a new user. (or an existing user when we delete their profiles).

When logon freeze, the only way is to manually kill 'LogonUI.exe' and then the user's session goes ahead, but then seems to arise issues also during logoff phase.

 

Before downgrading to CU3, that solves the issue, we've tried upgrading from CU4 to 2112, but the problem was still present; we've also tried removing any antivirus solutions just to be sure.

Profile solution is FSLogix, os is ws2019 with latest updates; we've also WEM agent in place, upgraded as well to v2112.

 

Hope this helps.

 

 

Stefano

 

[Thomas HALGAND]

Hi all,

He have both on premise & Citrix Cloud Virtual Apps & Desktop infrastructures. With our on premise infrastructure (1912CU1), we don't have the problem at all but it is present on our Cloud infrastructure (with up to date 2112 VDA installed on S2019 as well).

We have tried adding LogonUI.exe to sysprocs and LogoffCheckSysModules in the registry => No luck.

I will keep an eye on this thread.

Good luck to all, and don't forget to share your information if you have any! 

[Tore Skara1709154798]

Hi everyone,

 

We also have the same problem with one of our customers. They are running Windows Server 2019 (1809) VDAs with CVAD 2109 and FSLogix 2.9.7349.30108. Disconnected sessions will not log off gracefully. When manually terminating the Windows Logon User Interface Host (LogonUI.exe) process, the session is logged off immediately.

 

Not sure if the initial problem occurs when logging on, logging off or when the sessions is disconnected/timed out. I see sessions in "disconnected" state on the VDAs which have been "idle" for hours (way past configured RDS "timeout limits"). Users are not able to logon again/reconnect when this happens. It is not possible to log off the sessions through Citrix Studio (or even by PowerShell commands). Only by terminating the LogonUI.exe process (Windows Logon User Interface Host).

Anyone who has heard from Citrix on the matter? Seems a few people have registered support cases.