Logitech webcams session dis- and reconnection

[Björn Schläfli]

In the last weeks some users complained about issues with application launches (seamless). The first application launches properly, maybe a bit slow launching, but with every application started afterwards, the session is disconnected and reconnected and the workspace app disappears in between. 

We've found out that Logitech webcams connected to the endpoint lead to this problem. Disconnect the webcam and the issue is gone. Furthermore I've found out that this issue starts with vda 2103 and persists with all following versions. With VDA 2012 Logitech webcams are working.

What's new in Citrix edocs describe a change in webcam redirection.

"HDX webcam compression no longer requires the VDA to encode, transcode, and decode H.264 video resources. By default, the server streams video directly to the video conferencing applications running in the virtual session."

 

Seems that Logitech webcams cannot handle this new feature.

 

To disable this feature:

HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\HdxRealTime

Name: OfferH264ToApp

Typ: REG_DWORD

Wert: 0

 

I'll test this regkey and will let you know.

 

Our site:

Virtual Apps 2103

VDA 2112

Server 2016

 

Anyone else with this issue?

[mmora302]

We have had a ticket open for months with Citrix on this issue. This looks like it worked for us. Let me know your results.

Create the following registry key on the VDA:

 

Path :HKLM\Software\Citrix\SvcHost\IcaCtlsSvcs\
Value: GvchEnable
Type: DWORD Data: 0

 

Restart the VDA, and verify if the issue still occurs.

 

[Björn Schläfli]

This reg key is useless. Users with Logitech webcams still have the issue of dis- and reconnects while launching applications. I've set this key by gpo preferences because I don't know if a restart of the vda (and thus a image update) is required.

[Björn Schläfli]

Hi,

 

thank you, I'll try that. Do you know what this reg key does? I didn't find any information about it.

[mmora302]

13 hours ago, Björn Schläfli said:

Hi,

 

thank you, I'll try that. Do you know what this reg key does? I didn't find any information about it.

According to Citrix It disables the generic video camera handler. There should be no negative impact to the users. 

[Björn Schläfli]

Hi mmora302,

 

this is really great. Customer tests looked good. Thank you very much.

[Andy Vanderbeken]

On 3/1/2022 at 2:30 PM, Björn Schläfli said:

Hi mmora302,

 

this is really great. Customer tests looked good. Thank you very much.

 

Bjoern,

 

did you implement this through GPO or must it be inside the build ?

[Björn Schläfli]

Hi Andy

it needs a reboot. I've configured it with preferences in a gpo which is applied to our golden image server (we use pvs). I chose this way because it is easy to reproduce and it will always be applied to the golden image machine.

Have a good day