VMware Horizon Client 4.6 for Linux Release Notes

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Horizon Client for Linux 4.6 | 21 September 2017

Last Updated: 3 October 2017

These release notes cover the following topics:

Key Features

VMware Horizon Client for Linux makes it easy to access your Windows virtual desktop from a supported Linux system with the best possible user experience on the Local Area Network (LAN) or across a Wide Area Network (WAN).

  • Support for Ubuntu, Red Hat Enterprise Linux (RHEL), SUSE Linux Enterprise Desktop (SLED), and CentOS - The Horizon Client installer available from the VMware Downloads site provides support for these operating systems.
  • Unmatched performance - The adaptive capabilities of the VMware Blast and PCoIP display protocols are optimized to deliver the best user experience, even over low-bandwidth and high-latency connections. Your desktop is fast and responsive regardless of where you are.
  • Simple connectivity - Horizon Client for Linux is tightly integrated with VMware Horizon for simple setup and connectivity.
  • Secure from any location - At your desk or away from the office, your data is delivered securely to you wherever you are. Enhanced certificate checking is performed on the client. Horizon Client for Linux also supports optional RADIUS and RSA SecurID authentication.

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What's New in This Release

  • Virtualization Pack for Skype for Business
    You can run Skype for Business inside a virtual desktop without negatively affecting the virtual infrastructure and overloading the network. All media processing takes place on the Linux client machine, instead of in the virtual desktop, during Skype audio and video calls. To use this feature, you must install the Virtualization Pack for Skype for Business on the client machine during Horizon Client installation. A Horizon administrator must also install the Virtualization Pack for Skype for Business on the virtual desktop during Horizon Agent installation.
  • Raspberry Pi 3 support
    Horizon Client for Linux now supports the Raspberry Pi 3 Model B devices that are installed with ThinLinx Operating System (TLXOS) or Stratodesk NoTouch Operating System. The supported Horizon Client features include Blast Extreme, USB redirection, and H.264 decoding.
  • SHA-256 support
    Horizon Client has been updated to support the SHA-256 cryptographic hash algorithm.
  • Additional audio-in support
    Horizon Client for Linux now supports 8000Hz and 16000Hz audio-in sample rate when connecting to Horizon Agent 7.3.1 or later. The sample rate used is adjusted to the rate that is set on the Horizon agent.

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Internationalization

The user interface and documentation for Horizon Client are available in English, Japanese, French, German, Simplified Chinese, Traditional Chinese, Korean, and Spanish

Note: To have the client user interface use Simplified Chinese characters, set the client system to use the zh_CN locale. If you set the client system to use the zh_SG locale, the user interface is displayed in English characters.

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Before You Begin

  • The OpenSSL library is updated to version openssl-1.0.2l. For your convenience, the Horizon Client installer provided on the VMware Downloads site downloads and installs the library.
  • Horizon Client for Linux 4.6 is supported on the following 32-bit operating systems if you use the installer provided by VMware:
    • Ubuntu 12.04 and 14.04
    • Red Hat Enterprise Linux (RHEL) 6.8 and 6.9
    • SUSE Linux Enterprise Desktop (SLED) 11 SP4
    • CentOS 6.8 and 6.9
  • Horizon Client for Linux 4.6 is supported on the following 64-bit operating systems if you use the installer provided by VMware:
    • Ubuntu x64 12.04, 14.04, and 16.04
    • Red Hat Enterprise Linux (RHEL) 6.8, 6.9, 7.2, 7.3, and 7.4
    • SUSE Linux Enterprise Desktop (SLED) 12 SP2
  • VMware Horizon Client for Linux is supported with the latest maintenance release of VMware Horizon 6.x and later.
  • To install Horizon Client for Linux, download the installer from the VMware Horizon Client download page.
  • Horizon Client for Linux 4.6 does not ship with the GTK+ library, but it does use the library installed on the host system. Make sure your system is up to date with a version of the library that includes fixes for publicly reported security vulnerabilities. A list of the publicly reported security vulnerabilities, and the versions affected, for GTK+ can be found at https://www.cvedetails.com/vulnerability-list/vendor_id-666/GTK.html.

For more system requirements and detailed installation instructions, see VMware Horizon Client for Linux Installation and Setup Guide.

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Resolved Issues

  • On RHEL 7.2 64-bit using AMD open source drivers, with H.264 enabled and the VMware Blast protocol, users might not be able to connect to a remote desktop.
  • A green screen appears when you connect to a remote desktop with H.264 from a Ubuntu 16.04 client system with an Intel GPU.
  • Occasionally, the desktop or application session disconnects unexpectedly when audio-in is being used.

Known Issues

  • A known security issue can affect Horizon Clients. The issue involves a privilege escalation leveraging glibc.This issue was devised by the Project Zero team as described in CVE-2014-5119. To mitigate this issue, partners and customers are advised to update the Linux operating system as follows:
  • If you use Horizon Client to connect to a remote desktop that has client drive redirection disabled, such as through a group policy setting, or if you connect to a remote desktop that has View Agent 6.1.0 or an earlier version installed, no message is displayed to explain why the client drive redirection feature is not working.
  • In some versions of Linux, including CentOS 6.x, the Numlock LED does not work while in a View desktop.
  • If multiple Horizon clients connect to the same RDS desktop or remote application simultaneously and map to a location-based printer with the same name, the printer appears in the first client session, but not in later client sessions.
    Workaround: For the client sessions in which the printer does not appear, perform a manual refresh. For a remote desktop, press F5 or refresh the Devices and Printers window. For a remote application, close and reopen the application print dialog box. The location-based printer appears in the printer list.
  • Virtual printing might not work if you connect to a remote desktop using RDP, open Horizon Client on the remote desktop,launch a nested application session, and then log off and log back in to the desktop. When you try to print from the nested application, the expected printer list might not appear. This issue only occurs after you log back in to the desktop.
    Workaround: Reset the application on the remote desktop. To avoid having to set applications, use PCoIP for both ends of the session-in-session connection.That is, use PCoIP to connect to the remote desktop and use PCoIP to connect from within the desktop to the nested application. If you are using location-based printing, you can resolve this issue by closing and reopening the application's print dialog box.
  • If you use a FreeRDP connection and specify a monitor configuration that conflicts with the configuration the end user chooses, Horizon Client performance becomes poor and the client might stop responding altogether. For example, the following command for launching Horizon Client would cause problems if the user selected "Full Screen - This Monitor":

    vmware-view --enableNla --rdpclient=xfreerdp--xfreerdpOptions="/sec:nla /cert-ignore /p:password/u:crt\administrator /multimon"

    As a best practice, avoid specifying FreeRDP options for the display, such as /multimon or /workarea. Instead, let Horizon Client control the topology.
  • If your client system is running pcsc-lite version 1.5, smart card removal policy may not work, logging off, shutting down or resetting a Windows remote desktop may result in a black screen, or the Horizon Client menu may become blank for about 10 seconds when a user has smart card sessions to multiple desktops and the user disconnects from one desktop.
    Workaround: Upgrade to pcsc-lite 1.7.4 or later.
  • If you use a PulseAudio sound system, you might hear static when setting the volume using guest system volume slider.
    Workaround: Use the Linux client system's volume slider or use ALSA audio by adding sound.backendType = alsa to either the ~/.vmware/config or the /etc/vmware/config configuration file.
  • If you connect to a View desktop with FreeRDP and configure the desktop to connect to a separate disk, if the disk name includes non-ASCII characters, the disk name cannot be displayed correctly in the View desktop. For example, if you use non-ASCII characters in the disk name and then launch Horizon Client with command line option
    '--rdpclient=xfreerdp' and '--xfreerdpOptions="/drive: , /home/user"'
    the disk name does not appear correctly in the View desktop.
  • On Ubuntu 12.04 and 14.04, if you press the Windows key in a View desktop, the Windows key press is also captured by the client operating system.
  • On Ubuntu 12.04, occasionally you might see an issue when launching a View desktop in full screen mode.
    Workarounds: Update to the latest patch release of Ubuntu 12.04, or switch to the client operating system by pressing Alt+Tab, and then switch back to the View desktop session.
  • Users cannot use rdesktop 1.8.x to connect to Horizon 7 Windows desktops. This is because Horizon 7 does not support TLSv1.0 by default and rdesktop 1.8.x supports only TLSv1.0.
    Workaround: Enable TLSv1.0 on the desktop by setting the following registry key:
    [HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\SecurityProviders\SCHANNEL\Protocols\TLS1.0\Server]"Enabled"=dword:00000001
    Be aware that TLSv1.0 is considered insufficiently secure. For Windows 7 desktops, Microsoft KB https://support.microsoft.com/en-us/kb/3080079 must also be installed.
  • On RHEL 6.x, with two monitors at the maximum resolution of 2560 x 1600, if you change the order of the monitors (the main monitor becomes the secondary and the secondary becomes the main), and then run Horizon Client and connect to a desktop using PCoIP and setting FullScreen - All Monitors, after the remote desktop is displayed, the menu options File > Disconnect from Server and File> Return to Desktop and Application List do not work.
  • Some video files might not play properly on a remote desktop when MMR is enabled.
    Solution: Make sure that the video format is supported and the proper decoder plug-in for the video is installed on the client.
  • On a Windows 7 remote desktop, while playing video on Internet Explorer and then you open a new tab, the MMR video frame overlays in the new tab.
    Workaround: Do not open a new tab or switch to a different tab while video is playing.
  • Videos do not play smoothly in remote desktops and sound disappears when MMR is enabled and the network delay is more than 75 ms.
    Workaround: Disable MMR when the network delay is more than 75 ms.
  • In certain circumstances, opening a local file with File> Open in a remote desktop or remote application causes the guest operating system on the Horizon Agent machine to encounter a STOP error (blue screen) or to stop responding (hang) when client drive redirection (CDR) is used. For more information, see VMware Knowledge Base (KB) article 2149417: Agent machine gets STOP error or stops responding when you open a local file shared with CDR.
  • On some HP thin clients that have HP ThinPro 5.2.0 (T6X52011) operating system, Horizon Client for Linux might display a black screen or crash when user is playing some video on a remote desktop and pressing the fast-rewind button on Windows Media Player.
    Workaround: Upgrade the OS to HP ThinPro 6.1.0 (T7X61007) or the latest version.