

        =====================================================================
        =====================================================================
        DisplayLink Software Release: External Release Note
        Software Package: DisplayLink Graphics
        Version: 5.1.21568.0
        =====================================================================
        =====================================================================
        EXECUTIVE SUMMARY

        This is the R5.1 Product Release. It has completed system test and is
        suitable for deployment to end-users.

        DisplayLink Software Release 5.1 delivers the following features:
        - Faster video performance
        - Faster performance with DL1x5 products
        - 'Optimize for Video' GUI option
        
        This release is not compatible with MS Windows 7 and will refuse to 
        install on that operating system. Please visit 
        http://www.displaylink.com/win7 for DisplayLink Windows 7 drivers.

        Please note that the following areas of functionality have undergone
        very limited testing and may exhibit problems:
        - Use with over three DisplayLink screens
        - Use on Intel/ATI switchable graphics laptops

        Recommendations for use:
        ------------------------
        If using with more than one device, make sure each device is fully
        installed and working before adding the next.

        Minor issues can generally be resolved by
        - detaching and reattaching the DisplayLink device
        - changing the display mode via the DisplayLink GUI, or
        - changing the display mode via Windows Display Properties.

        On Windows Vista WDDM (Aero and Basic): DisplayLink software works
        closely with the graphics card and there may be interoperability issues
        with some graphics cards. If this happens,
        (1) try to upgrade to the latest graphics drivers
        (2) try to upgrade to latest DisplayLink software
        (3) report the issue via your support channel
        (4) if necessary, boot into Safe Mode and use Vista's Backup and
        Restore Center to recover.

        Video: video is supported with most popular video players on Windows
        Vista in WDDM/Aero Mode. Video is also supported in Extend mode on
        Windows XP. Video support is limited in other configurations including
        Windows Vista Basic Mode and mirror mode in Windows XP.

        For further support and information about DisplayLink software, please
        visit http://www.displaylink.com/support
        =====================================================================
        =====================================================================


        A. Introduction
        ===============
        This is the R5.1 Product Release. It has completed system test and is
        suitable for deployment to end-users.

        DisplayLink Software Release 5.1 delivers the following features:
        - Faster video performance
        - Faster performance with DL1x5 products
        - 'Optimize for Video' GUI option

        This release is not compatible with MS Windows 7 and will refuse to 
        install on that operating system. Please visit 
        http://www.displaylink.com/win7 for DisplayLink Windows 7 drivers.

        Please note that the following areas of functionality have undergone
        very limited testing and may exhibit problems:
        - Use with over three DisplayLink screens
        - Use on Intel/ATI switchable graphics laptops


        B. Contents
        ===========
        Executive Summary
        A. Introduction
        B. Contents
        C. New features
        D. Note on Windows Vista Modes
        E. How to Install
        F. How to Use
        G. Supported Operating Systems
        H. PC Minimum Specifications
        I. Language Support
        J. Supported Hardware
        K. Summary of Software State and Issues - Windows Vista WDDM
        K1. Windows Vista WDDM graphics card support
        K2. Normal use
        K3. Video players, rendering technologies and applications
        K4. Installer and auto-update function
        L. Summary of Software State and Issues - Vista XDDM, XP, 2K
        L1. Normal use
        L2. Video players, rendering technologies and applications
        L3. Installer and auto-update function
        M. Driver qualification information


        C. New features
        ===============
        DisplayLink Software Release 5.1 delivers the following features:
        - Faster video performance
        - Faster performance with DL1x5 products
        - 'Optimize for Video' GUI option

        Faster video performance
        ------------------------
        R5.1 includes specific video playback performance optimisations that
        greatly improve the user experience when playing video on DisplayLink
        screens.

        Faster performance with DL-165 and DL-195 products
        --------------------------------------------------
        This software release takes full advantage of some hardware features
        in the DL1x5 family of DisplayLink products that increase the
        rendering performance in specific conditions.

        'Optimize for Video' GUI option (Vista WDDM only)
        --------------------------------------------------
        This option in The DisplayLink GUI enables specific optimisations that
        can improve full screen video playback performance in certain
        circumstances.


        D. Note on Windows Vista Modes
        ==============================
        Normally, Windows Vista is in WDDM mode. In this mode, Vista graphics
        drivers are used, and the Vista Aero Glass and Vista Basic themes are
        available.

        Windows Vista PCs whose graphics drivers are not Windows Vista native
        will run in XDDM (XP-Compatible) mode. In this mode, the 3D Aero Glass
        theme is not available. This mode will be limited to PCs that were
        upgraded from XP to Vista and PCs with low-end graphics cards.

        DisplayLink software supports both modes in different ways, and the
        level of support and issues are different in the two cases.


        E. How to Install
        =================
        Important note: users who have v3.x 'USB Display Adapter' software
        installed in Add/Remove Programs must uninstall it before installing
        this release. Devices using v3.x software will continue working after
        this release is installed.

        Important note: if you are installing several devices, make sure that
        each is fully installed and showing an image before attaching the
        next.

        Important note: after uninstalling the DisplayLink software a reboot
        is required before installing the same or a different version of the
        software. Upgrading the software will require a reboot only when
        necessary. (5329)

        Software-first install
        ----------------------
        - Unzip the release package
        - Run 'setup.exe'
        - Once installation is complete, attach a DisplayLink device / screen
        to the PC and wait for it to come up.

        Hardware-first install from release package (.zip)
        --------------------------------------------------
        - Unzip the release package to a convenient place,
        - Connect the DisplayLink device
        - Point the 'New Hardware Found' wizard at the unzipped release
        package.

        Hardware-first install from CD
        ------------------------------
        - Put the CD into the PC's drive
        - Connect the DisplayLink device / screen
        - Point the 'New Hardware Found' wizard at the CD drive.

        Uninstalling the Release
        ------------------------
        - Go to 'Add or Remove Programs' dialog box (XP or 2K)
        - Go to 'Uninstall a Program' or 'Programs and Features' dialog box
        (Vista)
        - Select the customer product you installed
        - Choose 'Remove'.


        F. How to Use
        =============
        DisplayLink screens can run in three modes:

        - extend mode: the screen is part of the extended desktop
        - mirror mode: the screen copies the contents of the primary screen
        - off mode: the screen is black.
        - main display mode: the screen is the primary screen
        - notebook monitor off: the notebook screen is black and the 
          DisplayLink screen is the primary screen


        Display modes can be controlled through the DisplayLink GUI (DL-GUI)
        and through the Windows Display Properties dialog box (WDP).

        DisplayLink Manager GUI (System Tray Icon)
        ------------------------------------------
        This is an icon in the systray that looks like a monitor. Click on
        the icon to bring up the menu. You can control
        - screen resolution
        - colour quality
        - rotation
        - mode (extend, mirror, off, dock)
        - extend position (right, left, above, below)
        - turn off your notebook monitor
        - auto-update configuration
        - manual check for newer software
        - optimize the software for video playback

        Windows Display Properties (WDP)
        --------------------------------
        To open WDP on XP / 2K
        - right-click on the desktop
        - select 'Properties' from the context menu
        - go to the Settings tab

        To open WDP on Vista
        - right-click on the desktop
        - select 'Personalize' from the context menu
        - click on Display Settings link

        To open WDP from DL-GUI
        - bring up the DL-GUI menu
        - click 'Advanced...'

        With WDP you can control
        - screen resolution
        - colour quality
        - extend position
        - primary screen
        - refresh rate
        - whether the device is enabled (= part of the extended desktop)
        or not (= mirror or off mode).


        G. Supported Operating Systems
        ==============================
        This release supports the following operating systems:
        
        - Windows 2000 SP4
        
        - Windows XP SP2
        - Windows XP SP3
        
        - Windows Vista SP1 (32-bit and 64-bit editions)
        - Windows Vista SP2 (32-bit and 64-bit editions)
        

        H. PC Recommended Specifications
        ================================
        DisplayLink software can be run on PCs ranging from Netbooks (e.g. Asus 
        EeePC), Notebooks/Laptops, and Desktops - on processors ranging from 
        Atom N270 based PCs, basic single Core CPUs, and of course the latest 
        Dual and Quad Core CPUs.

        The performance of the software is dependent upon the processing power 
        available, and so more capable systems offer higher performance.

        Recommended typical system requirements are:
        
        Windows Vista
        =============
        For Windows Vista, the Windows Experience Index (WEI) is a useful 
        measure of hardware level. The WEI is accessible from 
        Computer->Properties or from Control Panel->System.
        For more information please visit http://windowshelp.microsoft.com/
        windows/en-us/help/0fee4637-8b21-41f1-87f6-66d2205420d61033.mspx

        The recommended typical hardware requirements for the PC are

        * WEI score of at least 3.0 in the 'Graphics; Desktop performance for 
          Windows Aero' category.
        * Recommended: WEI score of at least 3.0 overall, as recommended by 
          Microsoft.
        * For full-screen video playback the recommended hardware depends on
          the display resolution:
            * 1366x768: overall WEI score of at least 3.5.
            * 1920x1080 (HD): overall WEI score of at least 4.0 and a modern
              GPU (GPU introduced to the market after 2H'08 or top-of-the-line
              GPU introduced in 2008).
        * At least one USB 2.0 port.
        * 30 megabytes (MB) of free disk space.
        * Computer screen for use with the DisplayLink device, if it is not 
          integrated.
        * Network access for software downloads, or access to a CD-ROM drive.

        If the PC specification is below this, performance will be lower (or 
        CPU loading higher).
        
        Windows XP/2000
        ===============
        * For 1-2 monitors, business usage, productivity target. This may not 
        provide full frame rate DVD playback at full screen.
          - 1.2GHz Single Core CPU (Celeron or Atom N270 for example)
          - 512MB memory

        * For 3 monitors where 1 could run DVD video while also targeting 
        productivity and business apps. Will support only 1 video of DVD 
        resolution at full screen:
          - 1.6GHz CPU
          - 1GB memory

        * For 6 screens where 1 screen can run full screen DVD video:
          - 1.8GHz Core Duo
          - 1GB memory

        I. Language Support
        ===================
        DisplayLink software is localised in the following languages:

        - English
        - French
        - German
        - Dutch
        - Italian
        - Spanish
        - Portuguese
        - Polish
        - Hungarian
        - Russian
        - Traditional Chinese
        - Simplified Chinese
        - Japanese
        - Korean


        J. Supported Hardware
        =====================
        - DL115 / DL125 / DL165 / DL195 devices are supported.
        - DL120 / DL160 devices are supported.
        - Earlier devices are supported for backwards compatibility.
        
        This package supports up to 6 devices.
        

        K. Summary of Software State and Issues - Windows Vista WDDM
        ============================================================
        K1. Windows Vista WDDM graphics card support
        --------------------------------------------

        Because of restrictions in Vista WDDM support for graphics cards, the
        DisplayLink software works closely with the graphics drivers for
        the PC's graphics card. This software supports interworking with single 
        graphics cards from Intel, ATI, Nvidia and Via, including NVidia SLI
        in SLI mode.

        DisplayLink cannot exclude severe problems in the case of graphics cards
        or driver versions that have not been interoperability tested with
        DisplayLink software. Should such problems arise,

        - First, upgrade to the latest graphics drivers for your PC. Latest
        drivers can be found on the PC manufacturer's or graphics card
        manufacturer's website.

        - Second, upgrade to the latest DisplayLink software available for
        your device. Use 'Check now...' from the DisplayLink GUI to find and
        download latest software or visit www.displaylink.com.

        - If this does not help, please inform your DisplayLink device
        manufacturer's support line. Please give these details:
        + PC make, CPU and memory
        + graphics card make, model and driver version.


        Known Issues - General

        DisplayLink screens are not supported on systems with two graphics
        cards used simultaneously (supporting separate screens, or in ATI
        Crossfire configuration). Two graphics cards in Nvidia SLI 
        configuration are supported. (1704, 4441)
        
        DisplayLink software may cause blue screens on software configurations
        where WDDM drivers from different manufacturers have been installed on
        the same system, even if just one graphics card is present. (4323)

        On Vista WDDM, TMM does not appear when DisplayLink screens are
        attached. It works normally when no DisplayLink screens are
        attached. (2569)
        
        On some systems with switchable graphics architectures a maximum of 3
        DisplayLink screens is supported when in High Performance GPU mode.
        (4459)
        
        On a switchable graphics machine with DisplayLink software installed do
        not change the bios settings to ATI only or Intel only. 
        If you need to change those BIOS settings please first uninstall the DL
        software, then reinstall it once the new settings have been applied.
        (4339, 4506)
      
        On Vista WDDM, very occasionally, if the DisplayLink screen is primary 
        with the main screen off, then the DisplayLink screen flashes 
        continuously when resuming from hibernation. To cure the problem, 
        detach and re-attach the DisplayLink screen. To prevent the problem, 
        set the PC to require a password when coming out of hibernation. (2835)
        
        On Vista WDDM, very occasionally, if the DisplayLink screen is primary 
        with the main screen off, then both the main and DisplayLink screens 
        may show corruption when resuming from hibernation. To cure the problem, 
        enable and disable the main screen. (3219)

        On Vista WDDM aero, DisplayLink software can cause some PCs to become 
        more susceptible to TDRs (Timeout Detection and Recovery). More info
        at http://www.microsoft.com/whdc/device/display/wddm_timeout.mspx. 
        Suggested workarounds are (1) upgrade to the latest drivers for the 
        native graphics card; (2) increase TDR timeouts as described in the 
        linked article. (3217)
        
        Corruption can sometimes be seen around the mouse pointer on rotated
        DisplayLink screens. (5564)


        Known Issues - Intel GMA Integrated Graphics

        Some older versions of Intel GMA drivers will cause corruption on
        the DisplayLink screen. The solution is to upgrade them to version
        7.14.10.1111 or later.  This is with Vista WDDM. (2164)

        Users of Vista WDDM with Intel graphics should exercise caution if
        using two or more DisplayLink screens at a time. Very occasionally,
        mode changes or detach/reattach of two DisplayLink devices at once 
        has been observed to cause a complete machine lock-up. (2264)
        
        On Vista WDDM systems with Intel 945GM graphics and with graphics 
        driver versions around 7.14.10.1461 and 7.14.10.1504, playing a video 
        on a DisplayLink attached screen can cause the whole system to run 
        very slow. A reboot is needed to resolve this. To avoid the problem, 
        do not play video on such DisplayLink screens, or downgrade the
        graphics drivers. (3076)
        
        On Vista WDDM, some computers with Intel graphics reset DisplayLink 
        screens from extend to mirror when coming out of sleep. A workaround 
        is to disable the Intel persistence application, by removing  
        HKLM\Software\Microsoft\Windows\CurrentVersion\Run\Persistence 
        (The normal value would be C:\windows\system32\igfxpers.exe). (2546)
        
        DisplayLink software is currently compatible with Intel/ATI switchable 
        graphics architectures (with limited testing). Nvidia switchable 
        graphics platforms are not supported yet. (3068)
                
        Vista WDDM Aero is not currently supported on Intel GMA 500 graphics
        chipsets: DisplayLink software may cause blue screens on such systems.
        Please switch to Basic mode before using DisplayLink devices with Intel
        GMA 500 hardware. (5192)
        

        Known Issues - ATI graphics

        The ATI Catalyst Control Center is a tool provided by ATI to control
        ATI graphics cards. In the presence of DisplayLink attached screens,
        some parts of the tool, such as its adjustments submenu, do not work.
        This is on all OSes. (1596)

        Some versions of the ATI Catalyst Control Center crash in the
        presence of DisplayLink software. This has been observed with versions
        since ATI driver version 8.360. This can cause problems when a
        screen is attached to the PC. To work around the problem, uninstall the
        ATI Catalyst Control Center.

        On Vista WDDM with ATI graphics, the ATI External Event Utility can 
        interfere with remembered settings for DisplayLink screens. To avoid 
        this, disable the ATI External Event Utility as follows: Navigate to 
        Control Panel -> System and Maintenance -> Administrative Tools -> 
        Services: Ati External Event Utility and change the startup type to 
        Disabled. (2674)


        Known Issues - Nvidia graphics
        
        On Vista WDDM, Nvidia driver versions earlier than 7.15.10.7500 or
        7.15.11.7500 exhibit slowness on DisplayLink screens on some PCs. To 
        fix this, please upgrade to more recent Nvidia graphics drivers. (2282)

        With Vista, a maximum of four DisplayLink screens are supported on
        machines with Nvidia graphics. In certain rare cases, exceeding this
        has been seen to cause repeated serious crashes. (1781)

        On Vista WDDM, older versions of Nvidia drivers with versions prior to
        7.15.11.146 can behave badly in the presence of DisplayLink software.
        For instance they can cause blue screens when applications are
        maximised on DisplayLink screens. Also, if DisplayLink devices are
        attached or detached during restart, it may be necessary to press the
        reset button on the PC to restore normal functioning. (2119)

        On Vista WDDM, Nvidia 5 series graphics cards with driver version 
        7.15.10.9685 cause rundll32 crash messages in the presence of 
        DisplayLink software. If you have such a card, please update to a 
        more recent graphics driver version. (3077)

        On some Nvidia SLi systems, it is not possible to enable or disable 
        SLi mode while a DisplayLink screen is attached. (3147)

        Triple SLi systems are not supported. (3146)
        
        DisplayLink software is currently compatible with Intel/ATI switchable 
        graphics architectures (with limited testing). Nvidia switchable 
        graphics platforms are not supported yet. (3068)


        K2. Normal use
        --------------

        System behaviour with DisplayLink attached screens has been well 
        tested. Testing covers plug/unplug, mode changes, playing video, 
        hibernate, sleep/standby, multiple users, different user rights,
        attached screen as primary screen, attached screen as only screen,
        and other aspects.

        There are many minor issues. General recommendations if something
        goes wrong:

        - detach then reattach the DisplayLink device's USB cable
        - change display settings using DL-GUI
        - change display settings using WDP.


        Known Issues - Hibernate / sleep / monitor power save / screensavers

        On Vista, very occasionally, DisplayLink devices fail to resume from
        hibernation or sleep. This is due to issues in the Vista USB subsystem.
        Hotfix http://support.microsoft.com/kb/941600 should help. This is
        believed to be fixed in Vista Service Pack 1. (2126)

        On Vista WDDM, DisplayLink attached screens can be slow when resuming
        from hibernation or sleep. This is a Vista problem and is believed to
        be improved in Vista Service Pack 1. (2165)

        On all OSes, the desktop background is occasionally missing after
        restart or after resume from sleep or hibernation. The screens are
        still usable, and the background can be set again to the desired
        picture. (2154, 2072)

        On all OSes, detaching or attaching DisplayLink attached screens while
        a screensaver is running may cause strange effects. Sometimes it is
        necessary to detach and reattach the DisplayLink attached screen after
        exiting the screensaver. (1984)

        3D screensavers do not run well on DisplayLink devices and can cause
        flicker and/or decreased graphics performance. This is on all OSes. 
        (1150, 1177, 4426)

        If devices are detached from the PC before going into standby, then
        reattached during standby, very occasionally they may not resume when
        the PC comes out of standby.  If this happens, detach and reattach the
        devices to make them work again. (1492)


        Known Issues - Other

        In PowerPoint, the "Display slide show on:" menu has a bug which means
        that it does not work when there are gaps in the numbering of enabled
        displays (as shown in WDP). Users of PowerPoint 2007 can get round this
        by using "Show presentation on:" in the ribbon, rather than the "Set
        up slide show" box. (2337)

        CRT monitors may show speckles at very high resolutions. This is
        because the DisplayLink device cannot always support the high pixel
        clock required with high CRT refresh rates. (2155)

        After a reboot, the numbers used in Windows Display Properties to
        identify the attached screens may change. This is normal. (596)

        When using a display in mirror mode, changing the rotation setting can 
        cause the display to go into extend mode. Setting the display back to
        mirror mode will show the correct rotation. (2261)

        Occasionally, on rotating a DisplayLink screen the monitor may freeze, 
        change resolution or go black. This is most likely if several screens 
        are attached. To recover, detach and reattach the DisplayLink screen.
        (4061)

        The log on screen may be offset or incorrectly sized, when DisplayLink 
        screens are attached. (4144)
        
        After installing the DisplayLink software on a tablet PC, the pen 
        calibration software may not work correctly. Rebooting solves the 
        issue. (4448)
        
        On some configurations with many DisplayLink screens, the screens may 
        take tens of seconds to display an image after connection, and to move 
        windows after disconnection. (4852)
        
        Occasionally, Windows will recognise that a DisplayLink screens has 
        been disconnected after a long delay. (4852)
        
        Occasionally, moving a video window onto an extended, rotated DL screen
        results in corruption. To avoid this, don’t move the video window 
        around or change display settings while watching the video. (4697)
        
        On ATI graphics, function key enabled display layout utilities may not
        work correctly when the DisplayLink software is installed. (4964)
        
        On some configurations, using more than 3 DisplayLink screens might 
        cause some DisplayLink screens to show corrupt or missing graphics. 
        Detaching and reattaching the screens should cure the problem. 
        (4747, 4835, 5159)
        
        On a very small number of systems, a DisplayLink device might not work
        correctly after having been quickly disconnected and reconnected.
        A reboot is necessary to recover. To avoid the issue, wait a few 
        more seconds before reconnecting the device. (5471)
        
        In certain circumstances, after unplugging a DisplayLink display there
        can be a very long delay before the display is detached from the 
        Windows desktop. Rebooting greatly reduces the frequency of this issue
        on the affected configurations (5137)
 

        K3. Video players, rendering technologies and applications
        ----------------------------------------------------------
        Video is supported on Windows Vista in WDDM (Aero) mode. Video playing
        and rendering using hardware overlays is not supported. The following
        players are tested by DisplayLink:

        - Windows Media Player 11
        (www.microsoft.com/windows/windowsmedia/default.mspx)
        - WinDVD 8 (www.intervideo.com)
        - PowerDVD 7 (www.cyberlink.com)
        - RealPlayer 11 (www.real.com).

        This table shows what rendering interfaces are supported:

        Interface             Supported on Vista WDDM Aero?

        DxVA                  Yes, if supported by the GPU
        D3D                   Yes, but not if the DisplayLink screen is primary
        DirectDraw            Yes
        OpenGL                Yes, but not full screen, windowed only
        GDI+                  Yes, but not full screen, windowed only


        On Vista WDDM Basic, video is not supported. It may work in some
        cases but exhibits poor performance. It may stop working after an
        update from Windows Update that affects the graphics subsystem. (2028)

        On all platforms, depending on the player, there may be problems if
        the video window is moved between screens while video is running. It
        may be necessary to close and restart the video player.

        With Vista WDDM, on some lower-spec PCs, videos on DisplayLink attached
        screens pause frequently for several seconds at a time. This is because
        there is insufficient system performance to display video smoothly.
        (1798)


        Known Issues - General

        Don't change the logged-on user or the display mode, position or  
        arrangement of attached screens while a video is running. This usually 
        confuses the video player and it may stop playing and/or show 
        corruption on screen. (1982, 4435, 5260)

        On Vista WDDM, video players sometimes use hardware overlays to display
        video. DisplayLink software does not support hardware overlays and
        these videos do not display on DisplayLink screens. Examples: PowerDVD
        7 uses overlays when playing DVDs and so cannot display DVDs on
        DisplayLink screens. vlc can be configured to use overlays and will not
        work on DisplayLink screens if so configured. (1807)

        On Vista WDDM, some graphics-intensive applications use the GDI or
        OpenGL interfaces. On DisplayLink attached screens, such applications
        can display in a window but not full screen. Examples of such
        applications are Starcraft, Quake 3. Also, video players such as
        Windows Media Player, WinDVD fail to play in full screen mode on
        DisplayLink screens on some PCs. (1655, 2134)

        On Vista WDDM, applications such as games that use Direct3D will not
        display on a DisplayLink attached screen that is set to primary. (1815)

        Some players, including Windows Media Player, do not play DVD content
        well on DisplayLink attached screens which are set as primary. (2084)
        
        Full screen video might flicker on extending rotated DisplayLink 
        screens. The remedy is to avoid rotating the DisplayLink screen, or to
        play video in a window. (4695)
        
        On Vista in Basic mode, video will not play on DisplayLink screens after 
        installation until the PC is rebooted. In Aero mode no reboot is needed
        before video will play. (4432)


        Known issues with specific players and applications

        On Vista WDDM, if Windows Media Player is moved to the DisplayLink
        screen and is then made full-screen, the screen blanks.  To get out of
        this situation, either double click on the blank screen and the player
        window is restored to non-full screen mode, or right click on the blank
        screen to invoke the player context menu and select exit full screen.
        (2032)

        On Vista WDDM, if WinDVD is asked to play High-Definition content on a
        DisplayLink screen, the content will not display and the player may
        crash. This is because the player uses hardware overlays, which are not
        supported by DisplayLink software. (1986)

        On Vista WDDM, if PowerDVD 7 is playing video on a DisplayLink attached
        screen, and if the screen is rotated, then PowerDVD 7 crashes. The
        workaround is to apply rotation to the screen before launching PowerDVD
        7. (2013)
        
        On Vista 64-bit WDDM, dragging a WinDVD 9 playing video window between 
        screens may cause the video or the user interface to freeze.
        To recover, detach and reattach the DisplayLink screen(s). (5258)

    
        K4. Installer and Auto-update function
        --------------------------------------

        The installer and auto-update function, if enabled, work on all 
        supported operating systems, both hardware-first and software-first.
        

        Known issues

        Do not attach two new DisplayLink devices at once as software for one
        of them may fail to install. Instead, fully install one device and see
        it working before attaching a second device. (2022)

        On Vista WDDM, the machine may drop to basic mode when a new
        DisplayLink screen is connected. This is because of Vista's normal
        performance calculation when new screens are attached. Aero mode can be
        restored through Control Panel -> Windows Colour and Appearance -> Open
        classic appearance properties for more colour options -> Windows Aero.
        (2069)

        If you attach a new DisplayLink device, allow software to start
        installing, then cancel the install part way through, hardware-first
        install may no longer work. To complete the install, it may be
        necessary to run setup.exe directly. (1573)

        Virus checkers set to very high security may prevent the installer
        from running. They should be set to lower security during installation
        and restored to high security once installation is complete. (935)

        When installing, make sure that only a single user is logged into the
        PC. That user needs administrator privileges. (1112)

        On PCs where vbscript.dll is not registered with the DLLServer, the
        DisplayLink installer cannot run. (1824)

        AutoUpdate dialogs and menus are not yet localised in Hungarian,
        Portuguese and Traditional Chinese. Other languages are complete.
        
        When a previous usb display adapter driver for a DisplayLink device 
        is manually updated via device manager to this version a 'windows 
        encountered a problem installing the device' error may be shown during
        the installation. This error can be safely ignored as the software 
        installation does not depend on it.  (4663)


        L. Summary of Software State and Issues - Vista XDDM, XP, 2K
        ============================================================
        L1. Normal use
        --------------
        XDDM mode on Vista 64-bit is not supported. Please upgrade your
        graphics card driver to the latest native Vista version available.
        
        System behaviour with up to three DisplayLink attached screens has
        been well tested. Testing covers plug/unplug, mode changes, playing
        video, hibernate, sleep/standby, multiple users, different user rights,
        attached screen as primary screen, attached screen as only screen,
        and other aspects.

        There are many annoyances and intermittent issues. General
        recommendations when something goes wrong:

        - try detaching then reattaching the DisplayLink device's USB cable
        - try changing its display settings using the DisplayLink GUI or the
        Windows Display Properties dialog box.


        Known issues - hibernate / sleep / monitor power save / screensavers

        On all OSes, the desktop background is occasionally missing after
        restart or after resume from sleep or hibernation. The screens are
        still usable, and the background can be set again to the desired
        picture. (2154, 2072)

        On all OSes, detaching or attaching DisplayLink attached screens while
        a screensaver is running may cause strange effects. Sometimes it is
        necessary to detach and reattach the DisplayLink attached screen after
        exiting the screensaver. (1984)

        3D screensavers do not run well on DisplayLink devices and can cause
        flicker and/or decreased graphics performance. This is on all OSes. 
        (1150, 1177, 4426)
        
        3D screensavers are not displayed on DisplayLink screens that are
        rotated in portrait mode. (5076)
        
        When the machine is set to ask for a password after standby / sleep /
        hibernate / screensaver etc, sometimes the login screen displays on
        all attached screens and sometimes it displays on a single screen only.

        If devices are detached from the PC before going into standby, then
        reattached during standby, very occasionally they may not resume when
        the PC comes out of standby.  If this happens, detach and reattach the
        devices to make them work again. (1492)
        
        Very occasionally, DisplayLink screens may fail to resume from 
        hibernation or standby. They come on after detach / reattach.
        (4681, 4660) 

        Windows Foundation Presentation based applications may show corruption
        or flashing on DisplayLink screens when opened. See 
        http://en.wikipedia.org/wiki/Windows_Presentation_Foundation for 
        details of WPF based applications. (4825, 4931)
        
        There is an incompatibility on Windows XP between DisplayLink drivers
        and older drivers for ASIX USB to Ethernet devices, which are included
        in some USB docking stations. If you have problems in 
        connecting/disconnecting DisplayLink devices please make sure you have
        installed version 3.4.3.29 or later of the ASIX drivers for your USB to
        Ethernet devices. (5433)
        
        On Windows XP and with multiple DisplayLink devices connected, 
        occasionally a DisplayLink screen might show corrupted or blank 
        contents after disconnecting and reconnecting. To recover, change
        the resolution of the affected screen. (4880)
        
        On a very small number of systems, a DisplayLink device might not work
        correctly after having been quickly disconnected and reconnected.
        A reboot is necessary to recover. To avoid the issue, wait a few 
        more seconds before reconnecting the device. (5471)
        

        Known issues - Windows 2000

        Installation of DisplayLink driver on Windows 2000 SP4 requires patch
        SP4 Rollup 1. This is available from www.microsoft.com. See Microsoft
        Knowledge Base article KB891861.

        It is important to check in Windows 2000 that full USB2 is available,
        otherwise performance will be impaired. To do this, look in Device
        Manager under Universal Serial Bus Controllers for an item called
        "USB 2.0 Root Hub". If it is not there then performance will be USB1.
        (1188)

        On Windows 2000, when many devices are attached to the PC and the PC
        is hibernated then woken up, not all the devices come back to life
        immediately. It is occasionally necessary to detach and reattach the
        USB connection to a device to coax it back to life. (1293, 1302)
        
        On a Windows 2000 system where only a DisplayLink screen is enabled, 
        locking the screen and then disconnecting it could cause all the other
        screens to remain unusable. Reconnecting the DisplayLink screen solves
        the issue. (4501)

        Foreign language support on Windows 2000 has not been fully tested.
        
        Layout information (enabled/extending/primary) for the main screen is 
        sometimes lost after reboot. The layout can be restored using the 
        Windows Display Properties dialog box. (4636)


        Known issues - other

        When fast user switching to an user account without administrative
        privileges and then logging off, the DisplayLink screens may go black.
        (4446)
        
        In PowerPoint, the "Display slide show on:" menu has a bug which means
        that it does not work when there are gaps in the numbering of enabled
        displays (as shown in WDP). Users of PowerPoint 2007 can get round this
        by using "Show presentation on:" in the ribbon, rather than the "Set
        up slide show" box. (2337)

        CRT monitors may show speckles at very high resolutions. This is
        because the DisplayLink device cannot always support the high pixel
        clock required with high CRT refresh rates. (2155)

        The ATI Catalyst Control Center is a tool provided on machines with ATI
        graphics cards for managing extra screens. Some versions of this tool
        crash in the presence of DisplayLink software. This has been observed
        with versions since ATI driver version 8.360. The workaround is to
        uninstall the ATI Catalyst Control Center. (2054)

        After a reboot, the numbers used in Windows Device Properties to
        identify the attached screens may change. This is normal. (596)
        
        On Windows XP, very occasionally, a 'The system cannot write to the 
        specified device' warning may be displayed after changing the display
        mode several times (e.g. Extend/Dock mode) from the DisplayLink GUI. 
        If this happens, detach and reattach the devices to restore normal 
        operation. (4991)


        L2. Video players, rendering technologies and applications
        ----------------------------------------------------------
        On Vista XDDM, video support is very limited. With extended screens,
        video or DVD playback are not supported in general.  Exceptions:
        PowerDVD7 and Quicktime are able to display video on a DisplayLink
        attached display, so long as that display is the primary display. Video
        is not supported in clone mode. It works, but exhibits poor
        performance. (1495)

        On XP, video support is limited to players that support hardware
        overlays. In extend mode, the following media players work:

        - Windows Media Player 11
        (www.microsoft.com/windows/windowsmedia/default.mspx)
        - WinDVD 8 (www.intervideo.com)
        - PowerDVD 7 (www.cyberlink.com)
        - RealPlayer 11 (www.real.com)

        There is limited support for other video players, and for video in
        mirror mode.

        This table shows what rendering interfaces are supported:

        Interface             Supported on XP extend?

        DxVA                  No
        D3D                   No
        DirectDraw            Yes
        OpenGL                No
        GDI+                  No


        On all platforms, depending on the player, there may be problems if
        the video window is moved between screens while video is running. It
        may be necessary to close and restart the video player.


        Known issues - general

        Don't change the logged user or the display mode, position or 
        arrangement of attached screens while a video is running. This usually 
        confuses the video player and the video may stop playing. (1982)

        Some players, including Windows Media Player, do not play well on
        DisplayLink attached screens which are set as primary. (2084)

        DVD movies will not play back if they are dragged to an extended
        DisplayLink screen while running. They play OK if the player
        starts up on the extended screen. (no bug number)

        On Windows 2000, video playing is not supported. (2708)

        Known issues with specific players and applications

        Windows Media Player sometimes fails to play DVDs on extended screens 
        on Windows XP. The workaround is to switch off VMR in WMP. (3884)

        RealPlayer does not play DVDs on extended or mirrored screens on 
        Windows XP. This is the case whether the extra screens are 
        DisplayLink screens or directly attached. (2802)

        Skype video is believed to be unreliable with Vista. It may cause
        crashes (no bug number).

        Skype video does not work on DisplayLink screens with Windows XP. This
        is because Skype video uses VMR9, which is supported by DisplayLink
        software on Vista WDDM, but not on Vista XDDM or on XP. Trying to use
        Skype video on XP may cause black screens or freeze the DisplayLink
        attached screen. (1651)

        Blu-ray playback is not supported on DisplayLink screens. Players may 
        crash or behave erratically when trying to play Bluray content on a 
        DisplayLink screen. (3785, 5257)

        When using a display in mirror mode, changing the rotation setting can 
        cause the display to go into extend mode. Setting the display back to
        mirror mode will show the correct rotation. (2261)

        Occasionally, on rotating a DisplayLink screen the monitor may freeze, 
        change resolution or go black. This is most likely if several screens 
        are attached. To recover, detach and reattach the DisplayLink screen.
        (4061)
        
        On Windows XP, DVD playback might not work correctly immediately after
        having installed the DisplayLink software. Rebooting will solve the
        issue. (5466)


        L3. Installer and Auto-update function
        --------------------------------------

        The installer and auto-update function, if enabled, work on all
        supported operating systems, both hardware-first and software-first.
        USB drivers have been signed.


        Known issues

        On Windows 2000, DisplayLink software fails to install on PCs where
        Service Pack 4 was installed before installing a MUI pack. This is a
        Windows issue - see Microsoft Knowledge Base article 263212. To work
        round this problem, go to Control panel, Regional Options, select the
        General tab and change the Menus and Dialog combo box to English. You
        will need to log off, and log back on. Install DisplayLink software,
        and then set the language settings back to their original settings.
        (1010)

        Do not attach two new DisplayLink devices at once as software for one
        of them may fail to install. Instead, fully install one device and see
        it working before attaching a second device. (2022)

        If you attach a new DisplayLink device, allow software to start
        installing, then cancel the install part way through, hardware-first
        install may no longer work. To complete the install, it may be
        necessary to run setup.exe directly. (1573)

        Virus checkers set to very high security may prevent the installer
        from running. They should be set to lower security during installation
        and restored to high security once installation is complete. (935)

        When installing, make sure that only a single user is logged into the
        PC. That user needs administrator privileges. (1112)

        On PCs where vbscript.dll is not registered with the DLLServer, the
        DisplayLink installer cannot run. (1824)

        AutoUpdate dialogs and menus are not yet localised in Hungarian,
        Portuguese and Traditional Chinese. Other languages are complete.

        (Vista XDDM) Occasionally, after install and reboot, the DisplayLink
        devices are not operational. In this case, reboot again and they
        become operational. (969)
        
        On Windows XP, very occasionally, the DisplayLink devices might not
        work after installing the DisplayLink drivers using the 'Update driver'
        function in Device Manager or using Windows Update. Rebooting solves 
        the issue. (5369)
        
        
        M. Driver qualification information
        -----------------------------------
        
        The following DisplayLink driver components included in this release
        have been qualified and signed by Microsoft's Windows Quality Labs 
        (WHQL) with the specified submission identification number:

        ID 1339084 - usb-v5.0.18191.0
        ID 1319651 - mirror-v5.0.16859
        ID 1319878 - extend-v5.0.16961
        ID 1321659 - filter-5.0.17276.0
        ID 1338874 - dlkmd-v5.1.19941.0
        ID 1327227 - dlkmdldr-v5.0.18123.0
        ID 1327231 - composite-v5.0.18212.0
        

      