• With activated DRI3 and an AMD GPU Citrix H264 acceleration plugin could freeze. Selective H.264 mode (API v2) is not affected from this issue.
  • Citrix has known issues with GStreamer 1.0 which describe problems with multimedia redirection of H264, MPEG1 and MPEG2. GStreamer 1.0 is used if browser content redirection is active.
  • Browser content redirection does not work with activated DRI3 and hardware accelerated H.264 deep compression codec.
  • Citrix StoreFront Login with Gemalto smartcard middleware does not detect smartcard correctly if the card is inserted after start of login.
    As a workaround, insert the smartcard before starting StoreFront Login.
  • When using Citrix Workspace App 18.10 in combination with Philips Speech driver, the session occasionally terminates improperly at logout and hangs.
    As a workaround, the usage of Citrix Receiver 13.10 is recommended when Philips Speech driver is needed.
  • Citrix H264 acceleration plugin does not work with enabled server policy "Optimize for 3D graphics workload" in combination with server policy "Use video codec compression" > "For the entire screen".
  • When "Expand the session over a self-selected number of monitors" (for "Multimonitor full-screen mode") is used and Setup is restarted, "Restrict full-screen session to one monitor" is indicated and the monitor selection is greyed out. The functionality is available, only the notification in Setup is broken.
  • To launch multiple desktop sessions with Citrix HDX RTME and Citrix H.264 acceleration plugin, the following registry key must be enabled:


    Activate workaround for dual RTME sessions and H264 acceleration



    Rangeenabled / disabled
    This workaround is not applicable when "Enable Secure ICA" is active for the specific delivery group.

VMware Horizon

  • External drives mounted already before connection do not appear in the remote desktop.
    Workaround: map the directory /media as a drive. Then the external devices will show up inside the media drive.
  • Client drive mapping and USB redirection for storage devices should not be enabled both at the same time.
    • On the one hand, if you want to use USB redirection for your storage devices, you should note that the USB on-insertion feature is only working if the client drive mapping is switched off. 
      In the IGEL Setup client drive mapping can be found under Sessions > Horizon Client > Horizon Client Global > Drive Mapping > Enable Drive Mapping
      It is also recommended to disable local Storage Hotplug under Setup > Devices > Storage Devices > Storage Hotplug
    • On the other hand, if you use drive mapping instead, it is recommended to either switch off USB redirection entirely or at least to deny storage devices by adding a filter to the USB class rules. Furthermore, since Horizon Client relies on the OS to mount the storage devices itself, go to Setup > Devices > Storage Devices > Storage Hotplug, enable dynamic drive mapping and put number of storage hotplug devices to at least 1.

Parallels Client

  • Native USB redirection does not work with Parallels Client.
  • For using the new FIPS 140-2 compliance mode, it is necessary to connect to the Parallels RAS one time with FIPS support disabled.


  • In some cases, there are instabilities when using A.E.T. SafeSign smartcards.

Appliance Mode

  • Appliance mode RHEV/Spice: spice-xpi firefox plugin is no longer supported. The Console Invocation has to allow Native client (auto is also possible) and it should start in fullscreen to prevent opening windows.

Base system

  • Display resolution and rotation could not be changed with NVIDIA GPU driver via tcsetup.


  • Multimedia redirection with GStreamer could fail with Nouveau GPU driver.