Product Documentation

Known and fixed issues

Nov 05, 2015

General known issues

Caution: Editing the registry incorrectly can cause serious problems that may require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.
  • Release 1.8 is not fully compatible with the new Skype for Business client.  Note that if you do upgrade to the new Skype for Business application, run it in Lync 2013 mode, which your server controls.  [#555998]
  • When the Skype/Lync client is delivered as a published application, desktop sharing is not supported and should not be used as the server desktop will be shared rather that the local desktop. Application sharing can be used to share other hosted applications during a Skype/Lync call. [#571502]
  • The strings Start a Call, Start a Video Call, Select a Number, and Audio Video Settings are not localized into non-English languages.[#546592]
    The RealTime Connector installer contains registry files enabling you to update the custom menus. The 64- and 32-bit directories and files are in the I18 subdirectory of the product installation directory. To update the menu items to the correct language, run the corresponding language file as administrator, and then restart Lync.
  • If a user switches the microphone device by plugging in or unplugging a USB device during a live call, the far end might get unusable speech quality coming from the new microphone device. [#543276]
  • The user’s presence status does not display in the Audio Session Window. Workaround: View the user’s presence information in the Lync contact list.[#538178]
  • There might be problem dialing dual tone multi-frequency (DTMF) digits using a Jabra Pro 9465 device on a Linux client. Workaround: Use the Optimization Pack interface to dial the DTMF digits. [#547234]
  • It might take up to 90 seconds for the Optimization Pack to initialize in your environment. Workaround: Check if the call forwarding status displayed at the bottom of the main Lync window. If the status displays, the pairing between RealTime Connector and RealTime Media Engine completed and you can place calls. [#546718]
  • Users might hear an echo or other artifacts when using any built-in microphone and speakers on endpoints. Workaround: Use a headset on an endpoint. [#545463]
  • When the Optimization Pack user adds users having Tandberg 1700 MXP endpoints to a multiparty call, the Tandberg units do not receive a conference invitation from the Lync Server.
  • When using Receiver for Windows 3.x, your users may have problems logging off or shutting down while their VDA windows are open. It is recommended that you upgrade your users to Receiver for Windows 4.x. [#16698]
  • When Remote PC Access is enabled on a device and you try to start the RealTime Connector and the RealTime Media Engine from the device, you might have to wait a short period of time for the RealTime Media Engine to initialize. Wait about one minute before you try to place a call. [#14438]
  • When attempting to make high-definition video calls from a home office, take into account your user’s network bandwidth and ISP routing policies. If you observe pixelation of the video or problems with lip sync, adjust the Maximum Packet Size (MTU) on the network interface card properties to a lower value such as 900 to avoid situations where ISPs perform traffic shaping based on packet size.
  • Occasionally on devices running Linux Ubuntu 11 on 32-bit systems, you can experience poor video quality—namely flickering image—during a call. To improve video quality, increase foreground and decrease background lighting and adjust the anti-flicker setting on the transmitting camera.
  • You can only optimize one virtual desktop at a time per Windows client, and it is recommended to use one virtual desktop per client. However, Linux and Mac Receiver allow you to optimize more than one virtual desktop at a time. [#70461630]
  • If a call is in progress when Windows locks due to a timeout or a Ctrl-Alt-Del and Lock sequence occurs, the call will drop. [#70580804]
  • This version does not support federation to the consumer version of Skype. [#70593271]

HDX RealTime Media Engine known issues

  • Uninstalling the Citrix Receiver, uninstalls HDX Real Time Media Engine. You must reinstall HDX Real Time Media Engine after installing Receiver. For more information, see [#484913]
  • Sometimes, when attempting to install HDX RealTime Media Engine on Windows, a message indicates that there is no available disk space. However, limited space does exist on the Z:/ drive of the terminal. This is a known issue for Microsoft installers and applies to Citrix Receiver as well.
  • Linux might mistake some Plantronics or Sennheiser audio devices containing buttons for a Human Interface Device (mouse) instead of an audio device. When a user presses a button, Linux interprets it as a mouse button press and prevents the regular mouse from working correctly until the call is terminated. Workaround: Configure the Linux X11 graphics subsystem to ignore Plantronics or Sennheiser devices as sources of user input. [#521088]
    Section "InputClass" 
    Identifier "Plantronics" 
    MatchVendor "Plantronics" 
    Option "Ignore" "true" 
    Section "InputClass" 
    Identifier "Sennheiser" 
    MatchVendor "Sennheiser" 
    Option "Ignore" "true" 
  • The RealTime Media Engine software rejects incoming call attempts sent from the LifeSize Express 220 without signaling an incoming call dialog to the user. [#14762]
  • During installation or un-installation, it is possible to encounter certain error conditions where the error message string is not localized. [#14530, #93]
  • In Seamless mode, the following issues exist for Full Screen video:
    • Full Screen video appears in letterbox format with the Linux version of the RealTime Media Engine in Seamless mode. [#13564]
    • The Full Screen Control hides behind other apps in a Seamless session in XenApp Seamless mode. [#10731, #3]

HDX RealTime Connector for Microsoft Lync known issues

  • RealTime Connector might erroneously pop up messages stating that credentials are required even if the user typed in the correct credentials. This can happen if the endpoint device is experiencing DNS lookup errors. The RealTime Media Engine log files will also contain DNS lookup errors. [#541490]
  • If you sleep and wake up your endpoint quickly (<= 2 minutes), the RealTime Connector might fall back to using nonoptimized mode. It remains in nonoptimized mode until you sign off or exit Lync and restart. [#546453]
  • RealTime connector fails to install from the remote drive mounted in the VDA. Workaround: Copy the file locally onto the VDA and then install it.
  • Setting the call forwarding settings to simultaneously ring might cause two incoming call dialogs to display. Both are active and each can answer the call. If both are accepted, two RealTime Connector session windows are displayed. Workaround: Accept one of the incoming call dialogs and let the other expire. [#546232]
  • Lync Native calling is disabled by default. However, if the administrator enables Lync Native calling, you can accept a call using Lync Native calling when HDX RealTime Connector for Microsoft Lync is installed. To prevent this, make sure that built-in Lync calling is disabled when running Citrix HDX Optimization Pack.
  • Some report that video disappears (black screen appears) several times during the first 5 seconds just after conference creation. Others have reported a green frame displayed during the initial few seconds of video. This problem goes away after a few seconds. [#16312]

Fixed issues

  • If a user in an audio-only call escalates the call to become a video call, both sides of the call begin sending video. The correct behavior is that the person who escalated the call to video should start sending video but the recipient should have the option to send or not. [#540818, #539060, #550102, #547584]
  • RealTime Optimization Pack does not support configurations when anonymous participants are not allowed in conferences. [LOP 448]
  • Users are unable to dial into a Virtual Meeting Room from devices with RealTime Media Engine, XenApp, XenDesktop, and  Thin Desktop. [LC1313]
  • RealTime Optimization Pack selects incorrect routes when used in CentOS 6 if the ethernet interface has more than one address. [LC2276]
  • Plus (+) symbol in dial pad — When you press and hold the 0+ key as the first character being entered on the dial pad, should Lync insert a + sign in the dial pad entry box. The user needs to dial numbers like +4471897890.
  • Windows XPe endpoints are receiving unoptimized sessions due to a change to an internal MS Windows API. The Optimization Pack needs to check for the operating system and use the appropriate API. [LC2481]
  • When a user establishes a call using a public switched telephone network (PSTN) number, that user is unable to add another user to the call (convert it into an ad-hoc conference). [#562830]