===================================================================== ===================================================================== DisplayLink Software Release: External Release Note Software Package: DisplayLink Software Version: 4.4.10952.0 ===================================================================== ===================================================================== EXECUTIVE SUMMARY This is the R4.4 Product Release. It has completed system test, both in-house and externally. It is suitable for deployment to end-users. DisplayLink Software Release 4.4 delivers the following features: - Projector operation without reboot (POWR) - Better interaction with Vista Transient Multi-monitor Manager (TMM) - SDK for control of uninstallation - Bug fixes. 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 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 generally works using the most popular video players on Vista WDDM aero. Video works in extend mode on XP. Video support is limited in other configurations such as on Vista WDDM basic and in mirror mode on XP. ===================================================================== ===================================================================== A. Introduction =============== This is the R4.4 Product Release. It has completed system test, both in-house and externally. It is suitable for deployment to end-users. B. Contents =========== Executive Summary A. Introduction B. Contents C. New Features D. Note on 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 - Vista WDDM K1. 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 C. New Features =============== New features in R4.4 are: - Projector operation without reboot (POWR) - Better interaction with Vista Transient Multi-monitor Manager (TMM) - SDK for control of uninstallation - Bug fixes. Projector operation without reboot (POWR) ----------------------------------------- This feature is available in some customer packages. It provides a restricted mirror-only mode after install / upgrade and before the associated reboot. This can be helpful for users attaching to a projector for the first time. There are some limitations in reduced-functionality mode: - only mirror mode is supported; no extend option is available - performance is reduced compared to normal operation - rotation is not supported - logon screens are not mirrored. The software is functional only within a logged-on user session. Better interaction with Vista Transient Multi-monitor Manager (TMM) ------------------------------------------------------------------- The Transient Multi-monitor Manager (TMM) on Windows Vista detects newly attached monitors and configures their mode. DisplayLink software also watches for newly attached DisplayLink screens and configures their mode. The two programs can interact badly with each other. With R4.4 software, the TMM settings work when there are no DisplayLink screens attached. DisplayLink software manages all screens when there are DisplayLink screens attached. Users who attach a screen via the VGA or DVI port on their laptop will need to disconnect any DisplayLink screens, to use TMM to configure the screen. SDK for control of uninstallation --------------------------------- Some customers of DisplayLink bundle the DisplayLink installer / uninstaller in their own installer. This feature allows such customers to better control the uninstallation operation. Bug fixes --------- The following improvements have been made since R4.3 Maintenance Release 3 (4.3.9881): Always use correct display mode at first connect. (2554) Ensure that the monitor's preferred mode is used, in the situation where the DisplayLink device was first attached without a monitor present. (2699) Improve handling of resume from hibernation in the case where several screens are attached (2743, 2804) Fix problem that caused a DisplayLink screen to become disabled after log off / log on. (2735) Display suitable error message if cannot install/uninstall because user has insufficient privileges and UAC is off. (2514, 2762) Allow limited users who can elevate privilege using UAC to install / uninstall (2845, 2846) Allow installation by administrator who is not mentioned in the Administrators group. (2788) Fix occasional problem where a USB disconnect during connect caused the DisplayLink screen to offer a single display mode. (2445) Fix problem that could cause the DisplayLink systray icon to animate indefinitely and the screen to fail to come on, at first attach after reboot. (2621) Fix unhelpful user message "property.CORENOTINSTALLEDERROR" (2824) Fix corrupt VGA screen after returning from monitor power save with DisplayLink screen primary (2664) Updated some SDK documentation (2830) Fixed a problem in Vista XDDM mode, where unplug / plug of a DisplayLink screen could cause the PC to restart (2866) D. Note on Vista Modes ====================== Normally, Vista is in WDDM mode. In this mode, Vista graphics drivers are used, and the Vista Aero Glass and Vista Basic looks are available. Vista PCs whose graphics drivers are not Vista ones run in XDDM mode. In this mode, the Aero Glass look is not available. PCs that were upgraded from XP to Vista and PCs with low-end graphics cards run in XDDM mode. 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. 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. Display modes can be controlled through the DisplayLink GUI (DL-GUI) and through the Windows Display Properties dialog box (WDP). DL-GUI ------ 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) - extend position (right, left, above, below) - auto-update configuration - manual check for newer software. 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 64 bit operating systems are not supported. H. PC Minimum Specifications ============================ The minimum hardware requirements for the PC are: - PC with 1.2 GHz or higher processor clock speed, with an Intel Core 2 Duo or equivalent power CPU. - 512 megabytes (MB) of RAM for a single attached screen, 1 gigabyte (GB) of RAM for two attached screens, more for more attached screens. - 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. - CD-ROM or DVD drive if installing from CD. 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 ===================== - Certified DL120 / DL160 devices are supported. - Earlier devices are supported for backwards compatibility. - DL1x5 sample devices are supported, but R4.3 software does not fully exploit their capabilities. Each install package supports a range of hardware variants: - DisplayLink Early Access supports all DisplayLink internal USB devices and internal Ethernet devices but no customer branded devices. Ethernet devices require running a separate configuration application. - Customer branded releases only support the customer allocated Product IDs (PIDs). This package supports up to 6 devices with these PIDS: USB_0000: DisplayLink Device USB_0030: Kensington Dock USB_0031: Kensington sd200v USB_0032: Kensington Dock 33367 USB_0033: DisplayLink Device USB_0034: DisplayLink Device USB_0051: IOGEAR External VGA USB_0052: IOGEAR External VGA USB_0053: DisplayLink Device USB_0055: DisplayLink Device USB_0100: Samsung UbiSync Monitor USB_0101: Samsung UbiSync Monitor USB_0102: DisplayLink Device USB_0103: DisplayLink Device USB_0110: TOSHIBA Video Dock USB_0113: DisplayLink Device USB_0118: DisplayLink Device USB_0119: DisplayLink Device USB_011A: DisplayLink Device USB_011B: DisplayLink Device USB_0120: LG USB Easy Connection USB_0121: LG USB Easy Connection USB_0128: REX-USBDVI Multi Display Adapter USB_0131: DisplayLink Device USB_0132: DisplayLink Device USB_0133: XtraViU USB_0134: XtraViU USB_0135: XtraViU USB_0136: XtraViU USB_0137: DisplayLink Device USB_0138: DisplayLink Device USB_0140: USB to VGA (AN24X0) USB_0141: USB to DVI (AN24X0) USB_0142: DisplayLink Device USB_0146: DU2771N1 USB_0147: DU2781N1 USB_0149: Sewell DVI Card USB_014A: Sewell DVI Card USB_014B: DisplayLink Device USB_0150: I-O DATA USB-RGB USB_0151: I-O DATA USB-RGB/D USB_0158: Display-Enabled Tablet Cradle USB_015B: DisplayLink Device USB_015C: DisplayLink Device USB_015D: DisplayLink Device USB_015E: TRENDnet TU2-DVIV Display Adapter USB_015F: DisplayLink Device USB_016A: DisplayLink Device USB_0174: DisplayLink Device USB_0175: DisplayLink Device USB_0178: DisplayLink Device USB_017A: DisplayLink Device USB_0188: DisplayLink Device USB_0189: DisplayLink Device USB_018A: ASUS EzLink Display USB_0198: WS Tech USB Multi-Display USB_0199: DisplayLink Device USB_019B: DisplayLink Device USB_019C: DisplayLink Device USB_019D: DisplayLink Device USB_019E: DisplayLink Device USB_019F: DisplayLink Device USB_01A0: DisplayLink Device USB_01A8: DisplayLink Device USB_01A9: DisplayLink Device USB_01AB: DisplayLink Device USB_01AC: DisplayLink Device USB_01AD: DisplayLink Device USB_01AE: EVGA UV Plus+ USB_01AF: DisplayLink Device USB_01B0: DisplayLink Device USB_01BA: DisplayLink Device USB_01BE: ASUS EzLink Display (VW202B) USB_01C0: DisplayLink Device USB_01C1: DisplayLink Device USB_01C2: DisplayLink Device USB_01C3: DisplayLink Device USB_01D0: DisplayLink Device USB_01D4: DisplayLink Device USB_01E0: DisplayLink Device USB_01E9: DisplayLink Device USB_01EA: DisplayLink Device USB_01EB: DisplayLink Device USB_01EC: DisplayLink Device USB_01F9: DisplayLink Device USB_01FD: DisplayLink Device USB_0211: DisplayLink Device USB_0212: DisplayLink Device USB_8010: DisplayLink Device USB_8030: DisplayLink Device USB_8040: DisplayLink Device USB_8041: DisplayLink Device USB_8042: DisplayLink Device USB_8043: DisplayLink Device USB_8044: DisplayLink Device USB_8050: DisplayLink Device USB_8051: DisplayLink Device USB_8053: DisplayLink Device USB_8060: DisplayLink Device USB_8061: DisplayLink Device USB_8062: DisplayLink Device USB_8063: DisplayLink Device USB_8064: DisplayLink Device USB_8070: DisplayLink Device USB_8071: DisplayLink Device USB_8073: DisplayLink Device K. Summary of Software State and Issues - Vista WDDM ==================================================== K1. 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. We support interworking with single graphics cards from Intel, ATI, Nvidia and Via. We have interoperability tested against a representative selection of each of these cards, and continue to expand our test coverage in this area. We 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. - 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 SLi or Crossfire configuration). (1704) On Vista WDDM, TMM does not kick in when DisplayLink screens are attached. It works normally when no DisplayLink screens are attached. (2569) Known issues - Intel graphics Some older versions of Intel graphics drivers will cause corruption on the Nivo 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 Nivos at once has been observed to cause a complete machine lock-up. (2264) 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. Known issues - Nvidia graphics 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) K2. Normal use -------------- System behaviour with up to six 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. This is on all OSes. (1150, 1177) 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) Vista WDDM: it's best to avoid switching between 32 bit and 16 bit colour quality on DisplayLink attached screens. Occasionally, this causes the DisplayLink screen to stop working. Detach and reattach it to get it to work again. Very occasionally, this has caused a complete machine lock-up. (2070, 2260) On Vista WDDM, if a DisplayLink screen is primary, it is not possible for another DisplayLink screen to mirror it. (1870) 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) On Vista WDDM, when using the DisplayLink GUI to set rotation, occasionally the screen rotation will fail to match the GUI's rotation setting. To fix this, apply the setting again, or detach and reattach the DisplayLink screen. (2186) K3. Video players, rendering technologies and applications ---------------------------------------------------------- On Vista WDDM Aero, video playing largely works. Video playing and rendering using hardware overlays is not supported. The following 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). 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 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) 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 well on DisplayLink attached screens which are set as primary. (2084) 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) Skype video is believed to be unreliable with Vista. It may cause crashes. 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 WDDM, a problem has been observed playing a Blu-ray disk. When two DisplayLink screens were attached, and a Blu-ray disk was inserted, the directly attached screen froze. To avoid this problem, ensure that only one DisplayLink screen is attached when attempting to play a Blu-ray disk. (2637) K4. Installer and Auto-update function -------------------------------------- The installer and auto-update function work on all supported operating systems, both hardware-first and software-first. USB drivers have been signed. 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. L. Summary of Software State and Issues - Vista XDDM, XP, 2K ============================================================ L1. Normal use -------------- System behaviour with up to six 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. This is on all OSes. (1150, 1177) 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) 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) Foreign language support on Windows 2000 has not been fully tested. 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) 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) 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 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) Note that Windows Media Player and RealPlayer do 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) On Windows 2000, video playing is not supported. (2708) Known issues with specific players and applications 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) L3. Installer and Auto-update function -------------------------------------- The installer and auto-update function 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)