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# _generals
Slackbot
03/27/2023, 2:58 PMThis message was deleted.
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Balint Oberrauch
03/27/2023, 3:15 PMWhat kind of error do you have in your eventlog? Normally it's AV related, ctxgfx.exe not excluded
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newbie1998
03/27/2023, 3:17 PMb
Balint Oberrauch
03/27/2023, 3:23 PMBalint Oberrauch
03/27/2023, 3:24 PMExclusions for the VDA:
%SystemRoot%\System32\drivers\CtxUvi.sys
%UserProfile%\AppData\Local\Temp\Citrix\HDXRTConnector\*\*.txt
%ProgramFiles%\Citrix\User Profile Manager\UserProfileManager.exe
%ProgramFiles%\Citrix\Virtual Desktop Agent\BrokerAgent.exe
%ProgramFiles%\Citrix\HDX\bin\CtxSvcHost.exe
%ProgramFiles%\Citrix\HDX\bin\ctxgfx.exe
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newbie1998
03/27/2023, 3:25 PMthanks bud, i saw that too...they don't have trend micro
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Balint Oberrauch
03/27/2023, 3:26 PMHappens with almost all AV Vendors. Same issue today at a customer with Defender
Balint Oberrauch
03/27/2023, 3:26 PMn
newbie1998
03/27/2023, 3:27 PMyes, they have all that blocked
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Balint Oberrauch
03/27/2023, 3:27 PM%ProgramFiles%\Citrix\HDX\bin\ctxgfx.exe --> related to CVAD 2112 and your VDA with 2203 is newer
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newbie1998
03/27/2023, 3:32 PMi mean they have all that unblocked
newbie1998
03/27/2023, 3:58 PMupdate: ctxgfx.exe is not in the list of exclusions so i am adding that now.
newbie1998
03/27/2023, 4:11 PMno luck
newbie1998
03/27/2023, 5:16 PMso i removed the graphic card and it works fine
newbie1998
03/27/2023, 5:17 PMnot sure how that is causing the issue
newbie1998
03/27/2023, 5:19 PM#CK6TCV3JN - anyone have any other ideas for me to try?
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Ray Davis
03/27/2023, 11:18 PMAre they by chance modifying any ctxhooks with GPO? I now it may have worked before you upgraded. I'm just thinking what could be happening. @Jeremy Saunders has a beautiful write on a section here.
https://www.jhouseconsulting.com/2019/07/18/citrix-virtual-delivery-agent-vda-post-install-script-2015
Another link
https://support.citrix.com/article/CTX312452/grey-screen-when-launching-the-applications-or-desktops-ctxuvi-event-id-1005-and-1003
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Aaron O'Reilly
03/28/2023, 12:08 PMOn your image check for the UviEnabled =1 value under HKLM\SYSTEM\CurrentControlSet\Services\CtxUvi. After hitting the 2203 CU2 on Server 2022 update issue (https://discussions.citrix.com/topic/417832-cvad-connectionfailure-after-install-ltsr-2203-cu2-on-server-2022/page/3/) I had a grey screen issue after fixing it. Adding the missing reg key back into the image resolved it for me.
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Jeremy Saunders
03/28/2023, 12:40 PMMy post install script runs on every build I do, which sets UviEnabled to 1, so I would never pick this up. Great information @Aaron O'Reilly, and thanks for tagging me in @Ray Davis. I am beautiful 🙂
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